California · Monthly

September 2026

Final Issued 2026-10-21 · version 1 · Baseline 1991-2020 · next update 2026-11-10

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1 Key messages and climate synopsis

Statewide mean temperature of 20.8 °C (−0.3 °C relative to 1991–2020): the 17th coldest September in the 1979–2026 series (tied with 2006, 2016).
Statewide precipitation of 11.3 mm, 167% of normal: the 16th wettest September in the 1979–2026 series.
The highest maximum temperature at GHCN stations was 47.3 °C at Stovepipe Wells 1 SW on 10 September.
The largest 24-hour rainfall at GHCN stations was 57.5 mm at Bowman Dam on 4 September.
4 station records were broken (stations with at least 20 years of data).
U.S. Drought Monitor: 23% of the state in drought (D1–D4) on 29 September 2026 (+9 points since 25 August 2026).
El Niño conditions of very strong intensity in the equatorial Pacific (ONI JAS 2026: +2.2 °C).

Source: NOAA NCEI

Mean temperature

20.8°C

−0.3 °C vs. normal (normal 21.2)

Normal

17th coldest of 48 (1979–2026) (tied with 2006, 2016)

Maximum temperature

28.3°C

−0.8 °C vs. normal (normal 29.2)

Slightly below normal

11th coldest of 48 (1979–2026) (tied with 1980, 2013, 2017)

Minimum temperature

13.3°C

+0.1 °C vs. normal (normal 13.1)

Normal

24th warmest of 48 (1979–2026)

Precipitation

11.3mm

167% of normal (normal 6.8)

Much above normal

16th wettest of 48 (1979–2026)

Station records

Source: NOAA NCEI

2 Global and regional climate drivers

Sea-surface temperature anomaly, September 2026 (°C, 1991–2020)

Source: NOAA NCEI / PSL

Sea-surface temperature anomaly in the Niño regions (°C)

Region	Anomaly (°C)	Change from preceding period (°C)
Niño 1+2	4.7	0.6
Niño 3	3.6	0.5
Niño 3.4	2.8	0.3
Niño 4	0.9	0.0

Mean of the months in the period (OISST v2.1)

Source: NOAA CPC

El Niño conditions of very strong intensity: the Oceanic Niño Index (ONI) for JAS 2026 was +2.2 °C.

Source: NOAA CPC

Monthly Niño 3.4 anomaly, last 24 months (°C)

Source: NOAA CPC

MJO phase diagram (real-time OMI)

Source: NOAA PSL

Teleconnection indices

Index	Value	Phase
NAO	0.5	Positive
AO	1.2	Positive
PDO	−1.6	Negative

North Atlantic Oscillation (NAO); Arctic Oscillation (AO); Pacific Decadal Oscillation (PDO).

Source: NOAA CPC, NOAA NCEI

The Niño 3.4 anomaly was +2.84 °C (+0.32 °C relative to the preceding period).

The MJO was active on 3 of 30 days, most often in phase 2 (Indian Ocean); mean amplitude 0.7.

Other indices: NAO +0.53 (positive phase); AO +1.16 (positive phase); PDO −1.55 (negative phase).

3 Precipitation

Statewide precipitation

11.3mm

167% of normal (normal 6.8)

Much above normal

16th wettest of 48 (1979–2026)

Source: NOAA NCEI

Accumulated precipitation

Source: NOAA NCEI

Percent of normal precipitation (1991–2020)

Source: NOAA NCEI

Percent of normal by county

Source: NOAA NCEI

Precipitation by region

Region	Total (mm)	Normal (mm)	Difference (%)	Category
North Coast Drainage	25.0	12.9	93.4	Much above normal
Sacramento Drainage	13.8	9.1	51.2	Above normal
Northeast Interior Basins	12.6	9.6	31.8	Above normal
Central Coast Drainage	0.6	1.7	−62.4	Much below normal
San Joaquin Drainage	1.9	4.0	−51.4	Below normal
South Coast Drainage	8.5	3.3	159.2	Much above normal
Southeast Desert Basin	13.8	6.4	114.6	Much above normal

Source: NOAA NCEI

Stations with the largest precipitation excess

Region	County	Station	Altitude (m)	Anomaly (%)
South Coast Drainage	Los Angeles	Torrance AP	27.0	2903.9
South Coast Drainage	Los Angeles	Burbank Glendale Pasadena AP	223.0	1239.6
South Coast Drainage	Los Angeles	Culver City	28.0	1132.5
South Coast Drainage	Los Angeles	Van Nuys AP	239.0	768.6
Southeast Desert Basin	San Bernardino	Chino AP	194.0	768.4
South Coast Drainage	Los Angeles	Long Beach Daugherty AP	10.0	734.4
South Coast Drainage	Los Angeles	U C L A	131.0	689.5
South Coast Drainage	Los Angeles	Santa Monica Muni AP	53.0	546.4
South Coast Drainage	Orange	Fullerton Muni AP	26.0	523.8
South Coast Drainage	Los Angeles	Los Angeles Intl AP	30.0	516.4

Source: NOAA NCEI

Stations with the largest precipitation deficit

Region	County	Station	Altitude (m)	Anomaly (%)
San Joaquin Drainage	Kern	Glennville	957.0	−100.0
Southeast Desert Basin	Riverside	Hayfield Pumping Plt	418.0	−100.0
San Joaquin Drainage	Tulare	Lemon Cove	156.0	−100.0
South Coast Drainage	Santa Barbara	Santa Barbara	5.0	−100.0
San Joaquin Drainage	Stanislaus	Modesto AP	26.0	−100.0
San Joaquin Drainage	Kern	Bakersfield 5 NW	143.0	−100.0
Central Coast Drainage	Monterey	Big Sur Stn	61.0	−100.0
South Coast Drainage	Los Angeles	Burbank Valley Pump Plt	200.0	−100.0
South Coast Drainage	Santa Barbara	Cachuma Lake	240.0	−100.0
Sacramento Drainage	Yolo	Davis 2 WSW Exp Farm	18.0	−100.0

Source: NOAA NCEI

Largest 24-hour rainfall at stations

Station	County	Max 24 h rainfall (mm)	Date
Bowman Dam	Nevada	57.5	2026-09-04
Downieville	Sierra	51.8	2026-09-03
Crescent City Mcnamara AP	Del Norte	51.8	2026-09-02
Torrance AP	Los Angeles	39.4	2026-09-06
Mccloud	Siskiyou	36.8	2026-09-03
Burbank Glendale Pasadena AP	Los Angeles	35.8	2026-09-06
Strawberry Valley 2	Butte	35.6	2026-09-04
Joshua Tree	San Bernardino	33.5	2026-09-25
Volta Ph	Shasta	29.6	2026-09-04
Blue Canyon Nyack AP	Placer	29.2	2026-09-04

Source: NOAA NCEI

Daily statewide mean precipitation

Source: NOAA NCEI

Daily statewide mean and grid-cell maximum

Day	Statewide mean (mm)	Grid maximum (mm)	County
2026-09-01	0.0	1.1	Tulare
2026-09-02	0.2	6.4	Siskiyou
2026-09-03	2.2	52.4	Del Norte
2026-09-04	2.8	37.4	Modoc
2026-09-05	0.3	18.1	Placer
2026-09-06	0.3	16.0	San Bernardino
2026-09-07	2.0	28.5	San Bernardino
2026-09-08	0.0	1.9	Los Angeles
2026-09-09	0.0	2.4	Madera
2026-09-10	0.0	1.5	Inyo
2026-09-11	0.0	1.1	Los Angeles
2026-09-12	0.0	0.0	Del Norte
2026-09-13	0.0	8.3	Del Norte
2026-09-14	0.0	0.0	Del Norte
2026-09-15	0.0	2.0	Fresno
2026-09-16	0.0	0.0	Del Norte
2026-09-17	0.0	4.1	Siskiyou
2026-09-18	0.0	1.1	Siskiyou
2026-09-19	0.0	0.0	Del Norte
2026-09-20	0.1	5.7	Los Angeles
2026-09-21	0.0	5.4	Inyo
2026-09-22	0.4	14.7	Fresno
2026-09-23	0.0	1.3	Tulare
2026-09-24	0.3	15.2	San Bernardino
2026-09-25	0.7	37.0	Del Norte
2026-09-26	0.1	2.5	Siskiyou
2026-09-27	0.0	0.0	Del Norte
2026-09-28	0.2	9.8	Imperial
2026-09-29	0.8	26.6	San Bernardino
2026-09-30	0.7	19.6	San Bernardino

Source: NOAA NCEI

Statewide precipitation in September of each year

Source: NOAA NCEI

Statewide accumulated precipitation was 11.3 mm, 167% of the 1991–2020 average (6.8 mm), category “Much above normal”. It was the 16th wettest September in the 1979–2026 series.

The region with the highest percentage of normal was South Coast Drainage (259%) and the lowest was Central Coast Drainage (38%).

The largest daily grid-cell total was estimated on 3 September in Del Norte (52.4 mm).

Source: NOAA NCEI

4 Temperature

Mean temperature

20.8°C

−0.3 °C vs. normal (normal 21.2)

Normal

17th coldest of 48 (1979–2026) (tied with 2006, 2016)

Source: NOAA NCEI

Mean temperature

Source: NOAA NCEI

Mean temperature anomaly (1991–2020)

Source: NOAA NCEI

Mean temperature anomaly by region

Source: NOAA NCEI

Stations with the largest positive anomaly

Region	County	Station	Altitude (m)	Anomaly (°C)
South Coast Drainage	Los Angeles	Culver City	28.0	2.9
South Coast Drainage	Los Angeles	Torrance AP	27.0	2.6
South Coast Drainage	Ventura	Oxnard Ventura Co AP	12.0	2.5
South Coast Drainage	Santa Barbara	Santa Barbara Muni AP	2.0	2.5
South Coast Drainage	Los Angeles	Hawthorne Muni AP	17.0	2.4
South Coast Drainage	Santa Barbara	Santa Barbara	5.0	2.4
South Coast Drainage	Los Angeles	Los Angeles Intl AP	30.0	2.3
South Coast Drainage	Los Angeles	Santa Monica Muni AP	53.0	2.2
South Coast Drainage	Ventura	Pt Mugu Nf	4.0	2.2
South Coast Drainage	San Diego	Oceanside Muni AP	9.0	2.1

Source: NOAA NCEI

Stations with the largest negative anomaly

Region	County	Station	Altitude (m)	Anomaly (°C)
Sacramento Drainage	Placer	Blue Canyon Nyack AP	1611.0	−2.4
North Coast Drainage	Siskiyou	Yreka	827.0	−2.3
North Coast Drainage	Siskiyou	Montague Siskiyou AP	806.0	−2.3
South Coast Drainage	Los Angeles	Sandberg	1375.0	−2.0
Central Coast Drainage	Santa Clara	Mt Hamilton	1286.0	−2.0
San Joaquin Drainage	Tuolumne	New Melones Dam Hq	293.0	−1.9
San Joaquin Drainage	Fresno	Friant Government Camp	131.0	−1.8
San Joaquin Drainage	Tuolumne	Sonora	510.0	−1.8
Sacramento Drainage	Tehama	Red Bluff Muni AP	108.0	−1.7
Sacramento Drainage	Shasta	Redding AP	153.0	−1.6

Source: NOAA NCEI

Statewide mean temperature anomaly in September of each year

Source: NOAA NCEI

The statewide mean temperature was 20.8 °C, 0.3 °C below the 1991–2020 average (21.2 °C), category “Normal”. It was the 17th coldest September in the 1979–2026 series (tied with 2006, 2016).

By region, the largest anomaly was in South Coast Drainage (+0.7 °C) and the smallest in Sacramento Drainage (−1.2 °C).

Source: NOAA NCEI

Maximum temperature

28.3°C

−0.8 °C vs. normal (normal 29.2)

Slightly below normal

11th coldest of 48 (1979–2026) (tied with 1980, 2013, 2017)

Source: NOAA NCEI

Maximum temperature anomaly (1991–2020)

Source: NOAA NCEI

Lowest and highest monthly mean maximum temperature by region

Region	Lowest value (°C)	Station	Highest value (°C)	Station
North Coast Drainage	18.0	Arcata Eureka AP	30.5	Potter Valley Powerhouse
Sacramento Drainage	19.3	Tahoma	31.7	Winters
Central Coast Drainage	17.8	San Francisco Oceanside	31.7	Tracy Pumping Plt
San Joaquin Drainage	19.8	Grant Grove	35.8	Newman
South Coast Drainage	22.5	San Nicolas Is	32.2	Cachuma Lake
Southeast Desert Basin	19.5	Aspendell	41.2	Death Valley Np

Station monthly means (GHCN-Daily, ≥ 80% of days with data).

Source: NOAA NCEI

Daily statewide maximum temperature

Source: NOAA NCEI

The statewide maximum temperature was 28.3 °C, 0.8 °C below the 1991–2020 average (29.2 °C), category “Slightly below normal”. It was the 11th coldest September in the 1979–2026 series (tied with 1980, 2013, 2017).

By region, the largest anomaly was in South Coast Drainage (+0.2 °C) and the smallest in Sacramento Drainage (−1.7 °C).

Source: NOAA NCEI

Minimum temperature

13.3°C

+0.1 °C vs. normal (normal 13.1)

Normal

24th warmest of 48 (1979–2026)

Source: NOAA NCEI

Minimum temperature anomaly (1991–2020)

Source: NOAA NCEI

Lowest and highest monthly mean minimum temperature by region

Region	Lowest value (°C)	Station	Highest value (°C)	Station
North Coast Drainage	5.2	Ft Jones Rs	12.6	San Rafael-Civic Ctr
Sacramento Drainage	2.4	S Lake Tahoe AP	14.8	Oroville Muni AP
Central Coast Drainage	9.2	Pinnacles Np	15.3	Hearst Castle
San Joaquin Drainage	6.1	Glennville	17.5	Bakersfield AP
South Coast Drainage	10.0	Henshaw Dam	20.8	N Is Nas
Southeast Desert Basin	7.0	Aspendell	27.5	Death Valley Np

Station monthly means (GHCN-Daily, ≥ 80% of days with data).

Source: NOAA NCEI

Daily statewide minimum temperature

Source: NOAA NCEI

The statewide minimum temperature was 13.3 °C, 0.1 °C above the 1991–2020 average (13.1 °C), category “Normal”. It was the 24th warmest September in the 1979–2026 series.

By region, the largest anomaly was in South Coast Drainage (+1.1 °C) and the smallest in Sacramento Drainage (−0.7 °C).

Source: NOAA NCEI

5 Climate extremes and records

Highest maximum temperature

47.3°C

Stovepipe Wells 1 SW · 2026-09-10

Lowest minimum temperature

−3.9°C

Boca · 2026-09-14

Highest 24 h rainfall

57.5mm

Bowman Dam · 2026-09-04

Source: NOAA NCEI

Highest maximum temperature by county

County	Station	Temperature (°C)	Date
Inyo	Stovepipe Wells 1 SW	47.3	2026-09-10
Imperial	Imperial Co AP	45.0	2026-09-10
Riverside	Blythe Asos	45.0	2026-09-10
San Bernardino	Needles AP	45.0	2026-09-10
Merced	Newman	43.9	2026-09-10
San Diego	Borrego Desert Park	43.9	2026-09-10
Santa Barbara	Cachuma Lake	42.8	2026-09-10
Fresno	Fresno 5 NE	42.2	2026-09-11
Orange	Fullerton Muni AP	42.2	2026-09-09
Yolo	Davis 2 WSW Exp Farm	42.2	2026-09-11
Kern	China Lake Naf	41.7	2026-09-10
Kings	Lemoore Reeves Nas	41.7	2026-09-10
Los Angeles	Long Beach Daugherty AP	41.7	2026-09-09
San Luis Obispo	San Luis Obispo Mcchesney Fld	41.7	2026-09-09
Solano	Vacaville/Nut Tree AP Asos	41.7	2026-09-10
Tulare	Lemon Cove	41.7	2026-09-11
Sacramento	Sacramento Metro AP	41.1	2026-09-10
San Joaquin	Stockton AP	41.1	2026-09-10
Butte	Oroville Muni AP	40.6	2026-09-10
Madera	Madera Muni AP	40.6	2026-09-10

The 20 most extreme of 51.

Source: NOAA NCEI

Lowest minimum temperature by county

County	Station	Temperature (°C)	Date
Nevada	Boca	−3.9	2026-09-14
Tuolumne	Tuolumne Meadows Rs	−3.9	2026-09-18
Modoc	Alturas Muni AP	−2.8	2026-09-28
El Dorado	S Lake Tahoe AP	−2.2	2026-09-14
Sierra	Sierraville Rs	−1.1	2026-09-21
Siskiyou	Tulelake	−1.1	2026-09-14
Placer	Tahoe City	0.6	2026-09-18
Plumas	Quincy	1.7	2026-09-28
Shasta	Dunsmuir Trtmt Pl	2.2	2026-09-27
Inyo	Aspendell	2.8	2026-09-29
Lassen	Susanville 2SW	2.8	2026-09-05
Kern	Glennville	3.3	2026-09-03
Mariposa	So Entrance Yosemite Np	3.3	2026-09-18
Mono	Lee Vining	3.3	2026-09-30
San Bernardino	Barstow	3.3	2026-09-14
San Diego	Campo	3.3	2026-09-19
San Benito	Pinnacles Np	3.9	2026-09-27
Fresno	Friant Government Camp	4.4	2026-09-23
Monterey	Big Sur Stn	5.0	2026-09-28
Tulare	Grant Grove	5.0	2026-09-03

The 20 most extreme of 52.

Source: NOAA NCEI

Station records broken

Station	County	Variable	New value	Date	Previous record	Previous date
Barstow	San Bernardino	Lowest minimum temperature	3.3	2026-09-14	4.4	1982-09-30
Sonora	Tuolumne	Lowest minimum temperature	0.6	2026-09-18	1.7	1920-09-25
Burbank Glendale Pasadena AP	Los Angeles	Highest 24 h rainfall	35.8	2026-09-06	26.4	2015-09-15
Oceanside Muni AP	San Diego	Highest maximum temperature	37.2	2026-09-09	36.7	2015-09-10

Most extreme daily value of the period against the same period in all earlier years of record (at least 20 years; for weeks, the same calendar month).

Source: NOAA NCEI

Climate-extremes indices (statewide mean)

Index	Description	Value	Normal	Difference	Unit
TX90p	Warm days (Tmax > 90th percentile)	7.5	10.0	−2.5	%
TN90p	Warm nights (Tmin > 90th percentile)	12.6	10.0	2.6	%
TX10p	Cool days (Tmax < 10th percentile)	14.0	10.0	4.0	%
TN10p	Cold nights (Tmin < 10th percentile)	8.3	10.0	−1.7	%
FD	Frost days (Tmin < 0 °C)	0.2	0.4	−0.2	d
SU	Summer days (Tmax > 25 °C)	21.4	22.8	−1.4	d
TR	Tropical nights (Tmin > 20 °C)	4.6	3.9	0.7	d
WSDI	Warm spell days (≥ 6 days)	0.0	—	—	d
CSDI	Cold spell days (≥ 6 days)	0.2	—	—	d
Rx1day	Maximum 1-day precipitation	6.8	4.1	2.7	mm
Rx5day	Maximum 5-day precipitation	9.0	5.8	3.2	mm
CDD	Consecutive dry days (< 1 mm)	24.2	25.1	−0.9	d
CWD	Consecutive wet days (≥ 1 mm)	1.2	0.8	0.4	d

Percentile indices relative to calendar-day percentiles of 1991–2020 (5-day window); counts and maxima averaged over the state's grid cells.

Source: NOAA NCEI

Frost days by region

Source: NOAA NCEI

6 Drought

U.S. Drought Monitor, 29 September 2026

Source: National Drought Mitigation Center, USDA, NOAA

Share of the state by drought category, weekly U.S. Drought Monitor maps (%)

Map of	None (%)	D0–D4 (%)	D1–D4 (%)	D2–D4 (%)
2026-09-01	34.8	65.2	18.8	1.3
2026-09-08	34.8	65.2	18.8	1.3
2026-09-15	34.8	65.2	22.3	0.0
2026-09-22	30.2	69.8	23.3	0.0
2026-09-29	27.9	72.1	23.3	0.0

Cumulative shares: D1–D4 is the share in moderate drought or worse.

Source: National Drought Mitigation Center, USDA, NOAA

Counties with the most severe drought, U.S. Drought Monitor of 29 September 2026 (% of the county)

County	D0–D4 (%)	D1–D4 (%)
Modoc	100.0	100.0
Siskiyou	100.0	89.9
Lassen	100.0	58.5
Inyo	100.0	55.7
Imperial	100.0	54.5
San Bernardino	88.5	53.3
Riverside	76.0	48.6
Del Norte	100.0	38.7
Sierra	100.0	22.1
Placer	100.0	10.9

Cumulative shares: D1–D4 is the share in moderate drought or worse.

Source: National Drought Mitigation Center, USDA, NOAA

Standardized Precipitation Index (SPI) ending September 2026

Source: NOAA NCEI

Share of the state by SPI category

Source: NOAA NCEI

U.S. Drought Monitor, map of 29 September 2026: 23% of the state in drought (D1–D4), 0% in severe drought or worse (D2–D4) and 0% in extreme or exceptional drought (D3–D4); 72% was abnormally dry or in drought (D0–D4).

On the map of 25 August 2026, 14% of the state was in drought: a change of +9 points over the period.

SPI-3 (Jul–Sep 2026): statewide mean +0.29; 0% of the state in drought (SPI ≤ −1.0) and 0% in severe or extreme drought.

No county averaged an SPI-3 below −1.0.

SPI-1 (September 2026): 0% of the state in drought.

SPI-6 (Apr–Sep 2026): 1% of the state in drought.

SPI-12 (Oct 2025–Sep 2026): 1% of the state in drought.

7 Severe weather and notable events

No tropical cyclone came within 300 km of the state.

9 Outlook

Outlook for October 2026: most likely tercile

Source: NOAA CPC

Outlook for Oct–Dec 2026: most likely tercile

Source: NOAA CPC

Probability of each tercile by region, Oct–Dec 2026 (%)

Region	Precipitation: below	Precipitation: normal	Precipitation: above	Temp.: below	Temp.: normal	Temp.: above
North Coast Drainage	31.0	36.0	33.0	9.0	22.0	69.0
Sacramento Drainage	32.0	34.0	33.0	6.0	25.0	69.0
Northeast Interior Basins	31.0	33.0	36.0	6.0	24.0	70.0
Central Coast Drainage	26.0	36.0	38.0	9.0	23.0	67.0
San Joaquin Drainage	28.0	35.0	37.0	5.0	27.0	68.0
South Coast Drainage	27.0	34.0	39.0	6.0	24.0	70.0
Southeast Desert Basin	29.0	33.0	38.0	7.0	29.0	64.0

Source: NOAA CPC

ENSO outlook: probability of each phase (%)

Source: NOAA CPC

Probabilistic outlook from the North American Multi-Model Ensemble (NMME), initialised in October 2026, relative to 1991–2020 terciles. It is not an official forecast: consult the National Weather Service and NOAA's Climate Prediction Center.

Precipitation, October 2026: above normal is favoured over 0% of the state and below normal over 41%.

Mean temperature, October 2026: above normal is favoured over 100% of the state and below normal over 0%.

Precipitation, Oct–Dec 2026: above normal is favoured over 22% of the state and below normal over 0%.

Mean temperature, Oct–Dec 2026: above normal is favoured over 100% of the state and below normal over 0%.

Probability of El Niño in the official ENSO outlook: SON 100%, OND 100%, NDJ 100% and DJF 100%.

10 Annexes

Report climate regions

Monthly precipitation by county (mm)

County	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep
Alameda	68.0	92.9	1.7	82.5	11.8	0.3	0.0	0.0	1.4
Alpine	86.6	146.3	22.4	115.4	40.6	1.1	18.1	16.7	4.2
Amador	117.4	177.9	8.2	174.3	28.7	0.7	1.3	1.8	2.5
Butte	164.6	206.2	3.8	197.3	32.6	1.2	0.0	0.0	10.6
Calaveras	112.6	168.8	4.7	147.7	22.7	0.1	0.4	1.2	0.9
Colusa	84.7	133.4	0.5	99.5	12.6	0.0	0.2	0.3	1.9
Contra Costa	57.6	81.8	1.8	67.8	10.1	0.1	0.0	0.0	2.0
Del Norte	138.6	302.2	38.5	103.8	12.4	15.1	0.1	0.2	94.6
El Dorado	139.5	200.6	17.8	186.4	43.0	1.0	7.2	3.4	6.0
Fresno	66.6	101.9	0.2	53.5	12.0	0.1	1.3	3.6	4.6
Glenn	108.7	177.3	0.2	111.1	27.5	0.1	0.5	0.1	2.8
Humboldt	151.9	285.3	13.7	107.7	14.9	13.9	0.6	1.6	28.3
Imperial	5.2	1.0	0.2	0.0	0.1	0.1	0.0	0.1	6.4
Inyo	19.9	25.0	0.0	8.2	6.2	0.1	0.6	4.9	4.0
Kern	36.3	40.3	0.3	16.5	2.6	0.0	0.0	0.2	1.8
Kings	28.8	35.4	0.0	15.0	1.2	0.0	0.1	0.0	0.0
Lake	154.7	207.5	1.0	133.7	22.2	0.2	1.4	0.7	6.1
Lassen	41.3	98.2	7.1	60.0	29.8	5.7	1.1	1.0	17.9
Los Angeles	65.9	92.4	1.7	19.3	2.3	0.0	0.0	0.0	18.4
Madera	69.6	96.6	0.2	88.9	10.5	0.3	1.2	4.0	2.0
Marin	120.1	140.2	0.0	121.1	19.7	0.4	0.3	0.1	5.1
Mariposa	114.3	131.2	0.9	128.7	16.4	0.5	1.0	3.1	1.6
Mendocino	153.3	267.7	5.1	121.9	19.0	2.0	1.7	0.6	16.2
Merced	35.7	61.8	0.3	36.5	5.9	0.0	0.0	0.0	0.1
Modoc	28.0	72.1	11.8	42.8	43.6	9.4	2.2	0.9	28.1
Mono	34.1	66.9	1.9	48.9	22.2	2.0	12.6	16.9	6.7
Monterey	96.5	151.0	0.0	58.2	14.3	0.4	0.7	1.2	0.3
Napa	105.8	124.9	2.9	95.6	24.1	0.0	0.3	0.3	2.9
Nevada	142.7	214.4	26.9	228.9	45.5	2.1	4.1	0.6	24.4
Orange	46.1	74.1	0.6	17.6	2.0	0.0	0.0	0.0	19.2
Placer	130.9	206.1	27.4	199.0	46.2	2.6	4.2	1.9	16.1
Plumas	128.0	169.5	2.4	152.9	33.0	2.5	1.0	0.2	20.4
Riverside	26.8	23.1	0.1	5.6	1.3	0.1	0.1	1.2	14.9
Sacramento	69.1	90.3	3.9	104.4	18.0	0.0	0.0	0.1	0.5
San Benito	59.7	114.3	0.0	53.9	12.7	0.1	0.8	1.2	0.5
San Bernardino	19.2	19.0	0.3	4.0	0.5	0.3	0.2	3.0	20.0
San Diego	72.0	68.5	0.1	11.3	9.2	0.6	0.1	1.1	2.4
San Francisco	—	—	—	—	—	—	—	—	—
San Joaquin	51.3	87.0	2.9	77.2	9.0	0.0	0.0	0.9	0.1
San Luis Obispo	66.3	114.1	0.0	40.8	9.4	0.2	0.5	0.4	0.0
San Mateo	108.7	127.6	0.6	117.9	12.4	1.0	0.3	0.7	1.5
Santa Barbara	87.7	109.0	0.7	25.5	2.2	0.0	0.0	0.4	0.5
Santa Clara	81.5	103.5	0.6	83.5	11.1	0.4	0.2	0.1	1.1
Santa Cruz	134.6	158.0	0.8	98.8	14.0	0.9	0.9	0.2	1.3
Shasta	128.9	187.0	6.0	136.6	39.1	3.9	0.0	0.1	19.2
Sierra	113.9	164.6	15.7	154.4	39.5	2.8	10.1	0.8	20.6
Siskiyou	65.1	154.8	13.7	79.5	47.2	4.4	0.1	0.2	28.9
Solano	73.2	76.1	1.5	74.8	15.7	0.0	0.1	0.0	1.3
Sonoma	164.9	177.5	1.0	121.3	19.6	1.0	0.2	0.2	7.1
Stanislaus	51.4	78.3	3.3	47.4	7.4	0.0	0.0	0.4	0.1
Sutter	58.7	89.5	4.6	71.9	18.8	0.0	0.0	0.0	1.2
Tehama	121.1	210.5	3.6	146.4	31.0	2.0	0.1	0.0	9.6
Trinity	154.8	261.4	7.7	156.4	36.3	5.0	0.5	0.5	18.3
Tulare	85.9	102.1	0.1	54.8	7.1	0.0	0.6	5.2	1.2
Tuolumne	124.5	157.8	8.3	167.1	28.5	2.4	4.3	6.8	2.3
Ventura	84.7	113.7	5.7	21.4	1.7	0.1	0.1	0.0	8.2
Yolo	76.6	75.0	2.4	74.6	20.4	0.0	0.2	0.1	0.6
Yuba	109.0	159.1	11.5	152.4	32.4	1.0	0.0	0.0	11.0

CSV

Source: NOAA NCEI

Monthly maximum temperature by region (°C)

Region	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep
North Coast Drainage	12.0	12.1	19.5	16.3	21.4	25.3	28.5	29.3	23.7
Sacramento Drainage	13.1	13.2	21.8	17.5	23.7	29.1	32.0	32.8	26.2
Northeast Interior Basins	8.2	8.2	16.8	12.9	19.4	25.4	28.9	29.5	22.2
Central Coast Drainage	17.5	18.0	24.8	20.5	23.6	27.0	30.0	30.3	27.5
San Joaquin Drainage	14.0	15.8	23.7	19.9	25.0	30.5	33.2	34.3	28.5
South Coast Drainage	19.1	20.1	25.7	21.3	23.2	26.8	30.8	32.3	28.8
Southeast Desert Basin	17.2	20.4	28.8	25.2	30.3	36.4	38.9	39.5	33.4

CSV

Source: NOAA NCEI

Monthly mean temperature by region (°C)

Region	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep
North Coast Drainage	7.3	7.6	12.3	10.2	14.4	17.7	20.4	21.1	16.5
Sacramento Drainage	7.4	7.7	14.0	10.9	16.2	20.6	23.2	23.7	17.9
Northeast Interior Basins	1.6	2.1	8.6	5.7	11.3	16.5	19.8	20.1	13.6
Central Coast Drainage	11.4	12.1	16.9	13.9	16.4	19.4	22.0	22.5	19.7
San Joaquin Drainage	8.3	9.8	16.0	12.9	17.5	22.3	25.0	26.0	20.5
South Coast Drainage	13.2	13.9	18.3	15.0	17.0	20.3	23.9	25.4	22.1
Southeast Desert Basin	11.3	13.7	20.9	18.0	22.6	28.5	31.7	32.4	26.5

CSV

Source: NOAA NCEI

Monthly minimum temperature by region (°C)

Region	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep
North Coast Drainage	2.6	3.1	5.1	4.0	7.4	10.1	12.3	13.0	9.3
Sacramento Drainage	1.7	2.3	6.1	4.3	8.6	12.1	14.4	14.6	9.7
Northeast Interior Basins	−5.0	−4.1	0.5	−1.6	3.2	7.6	10.7	10.8	5.0
Central Coast Drainage	5.3	6.1	9.0	7.3	9.3	11.8	14.0	14.7	12.0
San Joaquin Drainage	2.7	3.7	8.3	6.0	9.9	14.2	16.8	17.8	12.5
South Coast Drainage	7.4	7.7	10.9	8.7	10.7	13.9	17.0	18.5	15.4
Southeast Desert Basin	5.4	7.0	12.9	10.7	14.8	20.7	24.5	25.3	19.7

CSV

Source: NOAA NCEI

Stations used

Id	Name	County	Latitude	Longitude	Altitude (m)	Days with data (Tmax) (%)
USC00040029	Adin Rs	Modoc	41.2	−120.9	1280.8	0.0
USC00040162	Alturas 9 ENE	Modoc	41.5	−120.4	1617.6	0.0
USC00040212	Angwin Pacific Union College	Napa	38.6	−122.4	522.7	100.0
USC00040332	Arvin	Kern	35.2	−118.8	137.2	73.0
USC00040343	Ash Mtn	Tulare	36.5	−118.8	520.6	50.0
USC00040444	Bakersfield 5 NW	Kern	35.4	−119.1	143.3	93.0
USC00040521	Barstow	San Bernardino	34.9	−117.0	676.7	100.0
USC00040673	Ben Lomond #4	Santa Cruz	37.1	−122.1	132.6	70.0
USC00040741	Big Bear Lake	San Bernardino	34.2	−116.9	2058.3	0.0
USC00040790	Big Sur Stn	Monterey	36.2	−121.8	61.0	100.0
USC00040820	Aspendell	Inyo	37.2	−118.6	2581.7	100.0
USC00040823	Bishop	Inyo	37.4	−118.4	1251.5	0.0
USC00040931	Boca	Nevada	39.4	−120.1	1699.3	47.0
USC00040943	Bodie California St Historic P	Mono	38.2	−119.0	2551.2	0.0
USC00040983	Borrego Desert Park	San Diego	33.3	−116.4	246.9	73.0
USC00041018	Bowman Dam	Nevada	39.5	−120.7	1641.3	0.0
USC00041159	Bucks Creek	Plumas	39.9	−121.3	576.4	0.0
USC00041194	Burbank Valley Pump Plt	Los Angeles	34.2	−118.3	199.6	33.0
USC00041253	Cachuma Lake	Santa Barbara	34.6	−120.0	240.5	100.0
USC00041277	Calaveras Big Trees	Calaveras	38.3	−120.3	1431.0	0.0
USC00041312	Calistoga	Napa	38.6	−122.6	106.7	100.0
USC00041424	Campo	San Diego	32.6	−116.5	801.6	100.0
USC00041428	Camp Pardee	Calaveras	38.2	−120.8	200.6	0.0
USC00041614	Cedarville	Modoc	41.5	−120.2	1428.9	0.0
USC00041715	Chico Univ Farm	Butte	39.7	−121.8	56.4	0.0
USC00041738	Chiriaco Summit	Riverside	33.7	−115.7	520.0	100.0
USC00041758	Chula Vista	San Diego	32.6	−117.1	17.1	0.0
USC00041806	Clearlake 4 SE	Lake	38.9	−122.6	411.2	43.0
USC00041838	Cloverdale	Sonoma	38.8	−123.0	121.9	100.0
USC00041864	Coalinga	Fresno	36.1	−120.4	204.2	0.0
USC00041907	Coleman Fisheries Stn	Shasta	40.4	−122.1	128.0	0.0
USC00041912	Colfax	Placer	39.1	−120.9	723.3	0.0
USC00041948	Colusa 2 SSW	Colusa	39.2	−122.0	15.2	0.0
USC00042012	Corcoran Irrig Dist	Kings	36.1	−119.6	61.0	0.0
USC00042214	Culver City	Los Angeles	34.0	−118.4	28.0	90.0
USC00042239	Cuyamaca	San Diego	33.0	−116.6	1414.3	100.0
USC00042294	Davis 2 WSW Exp Farm	Yolo	38.5	−121.8	18.3	100.0
USC00042319	Death Valley Np	Inyo	36.5	−116.9	−59.1	100.0
USC00042500	Downieville	Sierra	39.6	−120.8	888.5	100.0
USC00042574	Dunsmuir Trtmt Pl	Shasta	41.2	−122.3	661.1	70.0
USC00042598	Eagle Mtn	Riverside	33.8	−115.5	296.6	0.0
USC00042706	El Cajon	San Diego	32.8	−116.9	150.9	100.0
USC00042713	El Centro 2 SSW	Imperial	32.8	−115.6	−9.1	73.0
USC00042863	Escondido #2	San Diego	33.1	−117.1	182.9	0.0
USC00042934	Fairfield	Solano	38.3	−122.1	12.2	0.0
USC00042941	Fairmont	Los Angeles	34.7	−118.4	932.7	0.0
USC00043038	Fiddletown Dexter Rch	Amador	38.5	−120.7	661.4	0.0
USC00043083	Five Points 5 SSW	Fresno	36.4	−120.2	86.9	0.0
USC00043157	Ft Bidwell	Modoc	41.9	−120.2	1444.4	0.0
USC00043161	Ft Bragg 5 N	Mendocino	39.5	−123.8	37.5	100.0
USC00043182	Ft Jones Rs	Siskiyou	41.6	−122.8	831.8	93.0
USC00043191	Ft Ross	Sonoma	38.5	−123.2	34.1	0.0
USC00043244	Fremont	Alameda	37.5	−122.0	11.6	97.0
USC00043256	Fresno 5 NE	Fresno	36.8	−119.7	103.0	77.0
USC00043261	Friant Government Camp	Fresno	37.0	−119.7	131.1	97.0
USC00043357	Gasquet Rs	Del Norte	41.8	−124.0	118.0	0.0
USC00043402	Gibraltar Dam #2	Santa Barbara	34.5	−119.7	474.9	0.0
USC00043463	Glennville	Kern	35.7	−118.7	957.1	90.0
USC00043551	Grant Grove	Tulare	36.7	−119.0	2005.6	100.0
USC00043573	Grass Valley #2	Nevada	39.2	−121.1	731.5	100.0
USC00043578	Graton	Sonoma	38.4	−122.9	61.0	100.0
USC00043714	Half Moon Bay	San Mateo	37.5	−122.4	8.2	100.0
USC00043747	Hanford 1 S	Kings	36.3	−119.6	72.2	87.0
USC00043761	Happy Camp Rs	Siskiyou	41.8	−123.4	348.1	0.0
USC00043855	Hayfield Pumping Plt	Riverside	33.7	−115.6	417.6	87.0
USC00043875	Healdsburg	Sonoma	38.6	−122.9	53.9	27.0
USC00043882	Hearst Castle	San Luis Obispo	35.7	−121.2	465.1	97.0
USC00043914	Henshaw Dam	San Diego	33.2	−116.8	823.0	100.0
USC00043939	Hetch Hetchy	Tuolumne	38.0	−119.8	1179.6	0.0
USC00044025	Hollister 2	San Benito	36.8	−121.4	83.8	0.0
USC00044211	Idyllwild Fire Dept	Riverside	33.8	−116.7	1639.8	0.0
USC00044297	Iron Mtn	San Bernardino	34.1	−115.1	281.0	50.0
USC00044374	Jess Valley	Modoc	41.3	−120.3	1621.2	0.0
USC00044405	Joshua Tree	San Bernardino	34.1	−116.3	781.2	100.0
USC00044422	Juncal Dam	Santa Barbara	34.5	−119.5	688.8	0.0
USC00044484	Kelsey 1 N	El Dorado	38.8	−120.8	609.6	0.0
USC00044500	Kentfield	Marin	38.0	−122.5	44.2	100.0
USC00044534	Kettleman City	Kings	36.0	−120.0	73.2	53.0
USC00044555	King City	Monterey	36.2	−121.1	97.5	100.0
USC00044710	Lakeside 2 E	San Diego	32.9	−116.9	210.3	0.0
USC00044712	Lake Solano	Solano	38.5	−122.0	57.0	100.0
USC00044881	Lee Vining	Mono	38.0	−119.1	2071.7	100.0
USC00044890	Lemon Cove	Tulare	36.4	−119.0	156.4	100.0
USC00044957	Lindsay	Tulare	36.2	−119.1	132.6	87.0
USC00044997	Livermore	Alameda	37.7	−121.8	161.2	100.0
USC00045091	Long Valley 2	Riverside	33.8	−116.6	2554.2	0.0
USC00045100	Loraine 5 NNE	Kern	35.4	−118.4	1290.8	90.0
USC00045118	Los Banos	Merced	37.1	−120.9	36.6	97.0
USC00045360	Markley Cove	Napa	38.5	−122.1	146.3	100.0
USC00045449	Mccloud	Siskiyou	41.3	−122.1	985.4	77.0
USC00045598	Middletown	Lake	38.7	−122.6	341.7	0.0
USC00045739	Modesto Irrig Dist	Mariposa	37.6	−120.0	26.8	0.0
USC00045795	Monterey	Monterey	36.6	−121.9	37.2	100.0
USC00045933	Mt Hamilton	Santa Clara	37.3	−121.6	1286.3	100.0
USC00045983	Mt Shasta	Siskiyou	41.3	−122.3	1101.2	0.0
USC00046027	Muir Woods	Marin	37.9	−122.6	67.1	0.0
USC00046074	Napa State Hospital	Napa	38.3	−122.3	10.7	97.0
USC00046136	Nevada City	Nevada	39.2	−121.0	847.6	90.0
USC00046154	New Cuyama Fire Stn	Santa Barbara	34.9	−119.7	658.4	20.0
USC00046168	Newman	Merced	37.3	−121.0	27.4	100.0
USC00046174	New Melones Dam Hq	Tuolumne	38.0	−120.5	292.6	100.0
USC00046175	Newport Beach Harbor	Orange	33.6	−117.9	3.0	0.0
USC00046252	N Fk Rs	Madera	37.2	−119.5	806.2	67.0
USC00046336	Oakland Museum	Alameda	37.8	−122.3	9.1	100.0
USC00046399	Ojai	Ventura	34.4	−119.2	227.1	23.0
USC00046508	Orleans	Humboldt	41.3	−123.5	122.8	47.0
USC00046572	Oxnard Wfo	Ventura	34.2	−119.1	15.8	0.0
USC00046624	Palmdale	Los Angeles	34.6	−118.1	796.1	0.0
USC00046657	Palomar Mtn Obsy	San Diego	33.4	−116.8	1691.6	33.0
USC00046699	Parker Rsvr	San Bernardino	34.3	−114.2	224.9	0.0
USC00046719	Pasadena	Los Angeles	34.1	−118.1	263.3	0.0
USC00046730	Paso Robles	San Luis Obispo	35.6	−120.7	222.5	57.0
USC00046773	Pearblossom	Los Angeles	34.5	−117.9	945.2	0.0
USC00046826	Petaluma AP	Sonoma	38.3	−122.6	6.1	47.0
USC00046926	Pinnacles Np	San Benito	36.5	−121.2	398.4	100.0
USC00046940	Piru 2 ESE	Ventura	34.4	−118.8	217.0	0.0
USC00046961	Placerville 3 ENE	El Dorado	38.8	−120.7	810.2	27.0
USC00047085	Portola	Plumas	39.8	−120.5	1478.3	0.0
USC00047109	Potter Valley Powerhouse	Mendocino	39.4	−123.1	310.3	100.0
USC00047195	Quincy	Plumas	39.9	−120.9	1042.4	100.0
USC00047306	Redlands	San Bernardino	34.0	−117.2	429.8	0.0
USC00047326	Redondo Beach	Los Angeles	33.8	−118.4	43.3	30.0
USC00047339	Redwood City	San Mateo	37.5	−122.2	9.4	100.0
USC00047414	Richmond	Contra Costa	37.9	−122.4	6.1	73.0
USC00047702	San Andreas 2	Calaveras	38.2	−120.7	335.3	0.0
USC00047767	San Francisco Oceanside	San Francisco	37.7	−122.5	2.4	100.0
USC00047776	San Gabriel Canyon Ph	Los Angeles	34.2	−117.9	226.8	0.0
USC00047785	San Gabriel Fire Dept	Los Angeles	34.1	−118.1	110.6	0.0
USC00047813	San Jacinto	Riverside	33.8	−117.0	464.8	100.0
USC00047821	San Jose	Santa Clara	37.4	−121.9	14.9	100.0
USC00047851	San Luis Obispo Poly	San Luis Obispo	35.3	−120.7	93.9	30.0
USC00047880	San Rafael-Civic Ctr	Marin	38.0	−122.5	36.6	100.0
USC00047902	Santa Barbara	Santa Barbara	34.4	−119.7	4.9	100.0
USC00047933	Santa Margarita Boost	San Luis Obispo	35.4	−120.6	349.9	0.0
USC00047965	Santa Rosa	Sonoma	38.5	−122.7	50.6	97.0
USC00048014	Saugus Pwr Plt 1	Los Angeles	34.6	−118.5	658.7	0.0
USC00048122	Shafter 6E	Kern	35.5	−119.1	123.1	0.0
USC00048135	Shasta Dam	Shasta	40.7	−122.4	327.7	40.0
USC00048218	Sierraville Rs	Sierra	39.6	−120.4	1516.4	43.0
USC00048273	Skyline Ridge Preserve	San Mateo	37.3	−122.2	691.9	0.0
USC00048351	Sonoma	Sonoma	38.3	−122.5	29.6	100.0
USC00048353	Sonora	Tuolumne	38.0	−120.4	510.5	100.0
USC00048380	So Entrance Yosemite Np	Mariposa	37.5	−119.6	1538.3	23.0
USC00048407	S Lake Fs	Kern	35.6	−118.4	808.9	97.0
USC00048587	Stony Gorge Rsvr	Glenn	39.6	−122.5	243.8	0.0
USC00048606	Strawberry Valley 2	Butte	39.5	−121.2	1130.8	97.0
USC00048702	Susanville 2SW	Lassen	40.4	−120.7	1283.8	60.0
USC00048713	Sutter Hill Cdf	Amador	38.4	−120.8	483.4	53.0
USC00048758	Tahoe City	Placer	39.2	−120.1	1898.9	100.0
USC00048760	Tahoma	El Dorado	39.1	−120.1	1924.8	87.0
USC00048839	Tejon Rancho	Kern	35.0	−118.7	434.3	20.0
USC00048999	Tracy Carbona	San Joaquin	37.7	−121.3	41.1	0.0
USC00049001	Tracy Pumping Plt	Alameda	37.8	−121.6	18.6	93.0
USC00049035	Trona	San Bernardino	35.8	−117.4	516.6	97.0
USC00049053	Tulelake	Siskiyou	42.0	−121.5	1230.8	77.0
USC00049063	Tuolumne Meadows Rs	Tuolumne	37.9	−119.3	2649.9	77.0
USC00049099	Twentynine Palms	San Bernardino	34.1	−116.0	602.0	0.0
USC00049111	Twitchell Dam	Santa Barbara	35.0	−120.3	177.4	50.0
USC00049152	U C L A	Los Angeles	34.1	−118.4	131.1	100.0
USC00049185	Upper San Leandro Filters	Alameda	37.8	−122.2	120.1	0.0
USC00049219	Vallejo	Solano	38.1	−122.2	103.9	100.0
USC00049226	Valley Ctr 1N	San Diego	33.2	−117.0	393.2	0.0
USC00049298	Verdi 2W	Sierra	39.5	−120.0	1654.8	63.0
USC00049367	Visalia	Tulare	36.3	−119.3	92.4	97.0
USC00049378	Vista	San Diego	33.2	−117.2	131.1	0.0
USC00049390	Volta Ph	Shasta	40.5	−121.9	676.7	0.0
USC00049452	Wasco	Kern	35.6	−119.4	88.7	43.0
USC00049473	Watsonville Wtr Wks	Santa Cruz	36.9	−121.8	29.0	100.0
USC00049582	W Pt	Calaveras	38.4	−120.5	845.8	0.0
USC00049621	Whiskeytown Rsvr	Shasta	40.6	−122.5	394.7	20.0
USC00049742	Winters	Yolo	38.5	−122.0	41.1	90.0
USC00049785	Woodland Hills Pierce College	Los Angeles	34.2	−118.6	240.8	0.0
USC00049855	Yosemite Park Hq	Mariposa	37.8	−119.6	1224.7	0.0
USC00049866	Yreka	Siskiyou	41.7	−122.6	826.6	93.0
USC00049884	Yucca Mesa	San Bernardino	34.2	−116.4	1050.0	100.0
USW00003102	Ontario Intl AP	San Bernardino	34.1	−117.6	281.6	100.0
USW00003104	Desert Resorts Rgnl AP	Riverside	33.6	−116.2	−36.0	100.0
USW00003122	Torrance AP	Los Angeles	33.8	−118.3	27.4	100.0
USW00003131	San Diego Montgomery Fld	San Diego	32.8	−117.1	127.4	100.0
USW00003144	Imperial Co AP	Imperial	32.8	−115.6	−16.8	100.0
USW00003154	Camp Pendleton Mcas	San Diego	33.3	−117.4	21.3	100.0
USW00003159	Lancaster	Los Angeles	34.7	−118.2	712.6	100.0
USW00003166	Fullerton Muni AP	Orange	33.9	−118.0	26.2	100.0
USW00003167	Hawthorne Muni AP	Los Angeles	33.9	−118.3	16.8	100.0
USW00003171	Riverside Muni AP	Riverside	34.0	−117.4	257.6	100.0
USW00003177	Carlsbad Mcclellan Palomar AP	San Diego	33.1	−117.3	95.4	93.0
USW00003178	San Diego Brown Fld	San Diego	32.6	−117.0	158.8	100.0
USW00003179	Chino AP	San Bernardino	34.0	−117.6	193.9	97.0
USW00004222	Redding 12 WNW	Shasta	40.7	−122.6	432.2	100.0
USW00023110	Lemoore Reeves Nas	Kings	36.3	−120.0	70.7	100.0
USW00023114	Edwards Afb	Kern	34.9	−117.9	705.9	93.0
USW00023119	March Afb	Riverside	33.9	−117.2	468.2	100.0
USW00023122	Norton Afb	San Bernardino	34.1	−117.2	338.9	100.0
USW00023129	Long Beach Daugherty AP	Los Angeles	33.8	−118.1	10.4	100.0
USW00023130	Van Nuys AP	Los Angeles	34.2	−118.5	239.3	100.0
USW00023131	Victorville So Ca AP	San Bernardino	34.6	−117.4	869.0	93.0
USW00023136	Camarillo AP	Ventura	34.2	−119.1	21.6	97.0
USW00023152	Burbank Glendale Pasadena AP	Los Angeles	34.2	−118.4	222.8	100.0
USW00023155	Bakersfield AP	Kern	35.4	−119.1	149.4	100.0
USW00023157	Bishop AP	Inyo	37.4	−118.4	1252.7	100.0
USW00023158	Blythe Asos	Riverside	33.6	−114.7	120.4	93.0
USW00023161	Barstow-Daggett AP	San Bernardino	34.9	−116.8	584.9	97.0
USW00023174	Los Angeles Intl AP	Los Angeles	33.9	−118.4	29.6	97.0
USW00023179	Needles AP	San Bernardino	34.8	−114.6	270.7	100.0
USW00023182	Palmdale AP	Los Angeles	34.6	−118.1	764.7	100.0
USW00023187	Sandberg	Los Angeles	34.7	−118.7	1374.6	100.0
USW00023188	San Diego Intl AP	San Diego	32.7	−117.2	4.6	100.0
USW00023190	Santa Barbara Muni AP	Santa Barbara	34.4	−119.8	2.4	100.0
USW00023191	Avalon Catalina AP	Los Angeles	33.4	−118.4	477.0	100.0
USW00023199	El Centro Naf	Imperial	32.8	−115.7	−14.0	100.0
USW00023202	Travis Afb	Solano	38.3	−121.9	18.0	100.0
USW00023206	Sacramento Mather Afb	Sacramento	38.6	−121.3	39.9	100.0
USW00023208	Sacramento Mcclellan Afb	Sacramento	38.7	−121.4	25.0	100.0
USW00023213	Santa Rosa Sonoma Co AP	Sonoma	38.5	−122.8	36.3	100.0
USW00023225	Blue Canyon Nyack AP	Placer	39.3	−120.7	1611.2	100.0
USW00023230	Oakland Intl AP	Alameda	37.7	−122.2	1.5	100.0
USW00023232	Sacramento AP Asos	Sacramento	38.5	−121.5	5.8	100.0
USW00023233	Salinas AP	Monterey	36.7	−121.6	22.3	100.0
USW00023234	San Francisco Intl AP	San Mateo	37.6	−122.4	3.0	100.0
USW00023237	Stockton AP	San Joaquin	37.9	−121.2	8.2	100.0
USW00023243	Lompoc AP	Santa Barbara	34.7	−120.5	26.8	0.0
USW00023244	Moffett Fed Airfield	Santa Clara	37.4	−122.0	11.9	100.0
USW00023254	Concord Buchanan Fld	Contra Costa	38.0	−122.1	7.0	100.0
USW00023257	Merced Muni AP	Merced	37.3	−120.5	46.3	100.0
USW00023258	Modesto AP	Stanislaus	37.6	−121.0	26.5	100.0
USW00023259	Monterey Peninsul AP	Monterey	36.6	−121.8	48.8	100.0
USW00023272	San Francisco Dwtn	San Francisco	37.8	−122.4	45.7	100.0
USW00023273	Santa Maria Public AP	Santa Barbara	34.9	−120.5	74.1	97.0
USW00023275	Ukiah Muni AP	Mendocino	39.1	−123.2	183.8	83.0
USW00023277	Watsonville Muni AP	Santa Cruz	36.9	−121.8	49.4	100.0
USW00023285	Livermore Muni AP	Alameda	37.7	−121.8	119.8	100.0
USW00023293	San Jose	Santa Clara	37.4	−121.9	14.9	100.0
USW00024213	Eureka Wfo Woodley Is	Humboldt	40.8	−124.2	6.1	97.0
USW00024215	Mt Shasta	Siskiyou	41.3	−122.3	1083.0	100.0
USW00024216	Red Bluff Muni AP	Tehama	40.2	−122.3	107.9	100.0
USW00024257	Redding AP	Shasta	40.5	−122.3	152.7	100.0
USW00024259	Montague Siskiyou AP	Siskiyou	41.8	−122.5	806.2	100.0
USW00024283	Arcata Eureka AP	Humboldt	41.0	−124.1	64.3	97.0
USW00024286	Crescent City Mcnamara AP	Del Norte	41.8	−124.2	17.1	0.0
USW00053119	Hanford Muni AP	Kings	36.3	−119.6	75.9	100.0
USW00053120	Ramona AP	San Diego	33.0	−116.9	422.1	100.0
USW00053121	Oceanside Muni AP	San Diego	33.2	−117.3	9.1	97.0
USW00053139	Stovepipe Wells 1 SW	Inyo	36.6	−117.1	25.6	100.0
USW00053144	Edwards Afb N Aux Airfield	Kern	35.0	−117.9	695.9	97.0
USW00053150	Yosemite Village 12 W	Mariposa	37.8	−119.8	2017.8	100.0
USW00053151	Fallbrook 5 NE	Riverside	33.4	−117.2	347.5	100.0
USW00053152	Santa Barbara 11 W	Santa Barbara	34.4	−119.9	5.5	100.0
USW00053175	Corona Municipal AP	Riverside	33.9	−117.6	162.5	100.0
USW00093104	China Lake Naf	Kern	35.7	−117.7	680.0	80.0
USW00093107	San Diego Miramar Nas	San Diego	32.9	−117.1	145.4	100.0
USW00093110	Oxnard Ventura Co AP	Ventura	34.2	−119.2	11.9	100.0
USW00093111	Pt Mugu Nf	Ventura	34.1	−119.1	3.7	97.0
USW00093112	N Is Nas	San Diego	32.7	−117.2	4.3	97.0
USW00093115	Imperial Beach Ream Fld Nas	San Diego	32.6	−117.1	7.3	97.0
USW00093116	San Nicolas Is	Ventura	33.2	−119.5	161.2	87.0
USW00093121	Twentynine Palms Mc	San Bernardino	34.3	−116.2	643.1	0.0
USW00093134	Los Angeles Downtown/Usc	Los Angeles	34.0	−118.3	54.6	100.0
USW00093138	Palm Springs Asos	Riverside	33.8	−116.5	124.7	100.0
USW00093184	Santa Ana John Wayne AP	Orange	33.7	−117.9	13.1	100.0
USW00093193	Fresno Yosemite Intl	Fresno	36.8	−119.7	101.8	100.0
USW00093197	Santa Monica Muni AP	Los Angeles	34.0	−118.4	53.3	100.0
USW00093205	Marysville AP (Asos)	Yuba	39.1	−121.6	18.9	100.0
USW00093206	San Luis Obispo Mcchesney Fld	San Luis Obispo	35.2	−120.6	55.8	100.0
USW00093209	Paso Robles Muni AP	San Luis Obispo	35.7	−120.6	249.9	100.0
USW00093210	Oroville Muni AP	Butte	39.5	−121.6	57.0	100.0
USW00093214	Vandenberg Afb	Santa Barbara	34.7	−120.6	116.1	97.0
USW00093216	Beale Afb	Yuba	39.1	−121.4	38.1	100.0
USW00093225	Sacramento Metro AP	Sacramento	38.7	−121.6	7.3	100.0
USW00093227	Napa Co AP	Napa	38.2	−122.3	4.9	100.0
USW00093228	Hayward Air Terminal	Alameda	37.7	−122.1	9.4	100.0
USW00093230	S Lake Tahoe AP	El Dorado	38.9	−120.0	1907.1	100.0
USW00093241	Vacaville/Nut Tree AP Asos	Solano	38.4	−122.0	31.7	100.0
USW00093242	Madera Muni AP	Madera	37.0	−120.1	76.5	100.0
USW00093243	Merced 23 WSW	Merced	37.2	−120.9	23.8	100.0
USW00094299	Alturas Muni AP	Modoc	41.5	−120.6	1335.9	67.0

CSV

Source: NOAA NCEI

11 Glossary, methodology and sources

Anomaly: difference between the observed value and its 1991–2020 normal. Percent of normal: observed total divided by the normal, times 100. Station record: most extreme daily value for the same month in all earlier years of record (at least 20 years).

Temperature: NOAA nClimGrid-Daily. Precipitation: NOAA nClimGrid-Daily. nClimGrid-Daily is the grid behind NOAA's official statewide values; it is averaged here from 1/24° to 1/8° (about 12 km). Mean temperature is (Tmax + Tmin)/2. Statewide, regional and county averages are weighted by the area of each grid cell inside each polygon. Temperature maps, frost days and annex tables are given by region; regions are NOAA NCEI climate divisions, with each county in the division of its centroid. Recent weeks use NCEI's preliminary file of the month; such reports are marked preliminary and updated when the final file is published. Normals refer to 1991-2020; ranks compare values rounded to one decimal. Stations: GHCN-Daily (NOAA NCEI) cooperative and first-order stations; values flagged by its quality control are discarded, as are daily values more than 5 robust standard deviations from the station median and variables whose monthly anomaly differs by more than 3 °C from the gridded analysis. Period means require at least 80% of days with data and station normals at least 20 complete years. This report is generated automatically and does not replace official information from the National Weather Service or the state climatologist.

Source	Product	License	Citation
NOAA CPC	Official ENSO probabilities	Public domain (NOAA)	—
NOAA CPC	ONI, Niño-region SST indices (OISST v2.1), NAO and AO	Public domain (NOAA)	NOAA Climate Prediction Center climate indices.
NOAA NCEI / PSL	Extended Reconstructed SST v5 (ERSST v5), 2°	Public domain (NOAA)	Huang et al. (2017), J. Climate, doi:10.1175/JCLI-D-16-0836.1
GDACS	Global Disaster Alert and Coordination System event list	See provider terms	—
NOAA NCEI	GHCN-Daily	Public domain (NOAA)	Menne et al. (2012), J. Atmos. Oceanic Technol., doi:10.1175/JTECH-D-11-00103.1
NOAA NCEI	IBTrACS v04r01 tropical-cyclone best tracks	Public domain (NOAA)	Knapp et al. (2010), Bull. Amer. Meteor. Soc., doi:10.1175/2009BAMS2755.1
NOAA NCEI	Pacific Decadal Oscillation index (ERSST v5)	Public domain (NOAA)	—
NOAA NCEI	nClimGrid-Daily, contiguous United States (1/24°, averaged here to 1/8°)	Public domain (NOAA)	Durre, I., et al. (2022). NOAA's nClimGrid-Daily Version 1. NOAA National Centers for Environmental Information. doi:10.25921/c4gt-r169
NOAA CPC	North American Multi-Model Ensemble (NMME) tercile probabilities, 1°	Public domain (NOAA)	Kirtman et al. (2014), Bull. Amer. Meteor. Soc., doi:10.1175/BAMS-D-12-00050.1
NOAA PSL	Real-time OLR MJO Index (ROMI)	Public domain (NOAA)	Kiladis et al. (2014), Mon. Wea. Rev., doi:10.1175/MWR-D-13-00301.1
National Drought Mitigation Center, USDA, NOAA	U.S. Drought Monitor, weekly maps and area statistics	Free to use with credit (NDMC)	The U.S. Drought Monitor is jointly produced by the National Drought Mitigation Center at the University of Nebraska-Lincoln, the United States Department of Agriculture and the National Oceanic and Atmospheric Administration. Map courtesy of NDMC.
US Census Bureau TIGERweb	US Census Bureau, TIGERweb counties (generalised)	Public domain (US Government work)	—

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