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National mean temperature anomaly for September, 1979–2026

Latest report: Week 40, 2026 (28 September – 4 October) Final

Mean temperature +0.9 °C Precipitation 44 %

National mean temperature of 27.9 °C (+0.9 °C relative to 1991–2020): the 3rd warmest week 40 in the 1979–2026 series.

National precipitation of 10.9 mm, 44% of normal: the 10th driest week 40 in the 1979–2026 series.

Latest by type: Monthly – September 2026 · Seasonal – Summer 2026 · Annual – Year 2025

2026 at a glance

Mean temperature anomaly (°C)
−2.0+0.0+2.0JanFebMarAprMayJunJulJuly 2026: +1.3 °CAugAugust 2026: +1.3 °CSepSeptember 2026: +0.6 °COctNovDec
Precipitation (% of normal)
25 %100 %175 %JanFebMarAprMayJunJulJuly 2026: 46 %AugAugust 2026: 85 %SepSeptember 2026: 72 %OctNovDec

Report archive

PeriodTypeStatusIssuedMean temperaturePrecipitationPDF
Week 40, 2026 (28 September – 4 October) Weekly Final 2026-10-11 +0.9 °C 44 % PDF
September 2026 Monthly Preliminary 2026-10-11 +0.6 °C 72 % PDF
Week 39, 2026 (21–27 September) Weekly Final 2026-10-11 −0.2 °C 91 % PDF
Week 38, 2026 (14–20 September) Weekly Final 2026-10-11 +0.7 °C 68 % PDF
Summer 2026 Seasonal Final 2026-10-11 +1.2 °C 71 % PDF
August 2026 Monthly Final 2026-10-11 +1.3 °C 85 % PDF
July 2026 Monthly Final 2026-10-11 +1.3 °C 46 % PDF
Year 2025 Annual Final 2026-10-11 +0.9 °C 95 % PDF