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National mean temperature anomaly for September, 1979–2026

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

Mean temperature +1.4 °C Precipitation 183 %

National mean temperature of 25.0 °C (+1.4 °C relative to 1991–2020): the warmest week 40 in the 1979–2026 series.

National precipitation of 41.6 mm, 183% of normal: the 3rd wettest 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)
−3.0+0.0+3.0JanJanuary 2026: +1.1 °CFebFebruary 2026: +2.0 °CMarMarch 2026: +2.4 °CAprApril 2026: +1.4 °CMayMay 2026: +1.0 °CJunJune 2026: +0.8 °CJulJuly 2026: +1.1 °CAugAugust 2026: +1.7 °CSepSeptember 2026: +2.1 °COctNovDec
Precipitation (% of normal)
25 %100 %175 %JanJanuary 2026: 90 %FebFebruary 2026: 46 %MarMarch 2026: 96 %AprApril 2026: 121 %MayMay 2026: 114 %JunJune 2026: 116 %JulJuly 2026: 76 %AugAugust 2026: 62 %SepSeptember 2026: 80 %OctNovDec

Report archive

PeriodTypeStatusIssuedMean temperaturePrecipitationPDF
Week 40, 2026 (28 September – 4 October) Weekly Final 2026-10-11 +1.4 °C 183 % PDF
September 2026 Monthly Preliminary 2026-10-11 +2.1 °C 80 % PDF
Week 39, 2026 (21–27 September) Weekly Final 2026-10-11 +1.7 °C 96 % PDF
Week 38, 2026 (14–20 September) Weekly Final 2026-10-11 +1.9 °C 71 % PDF
Summer 2026 Seasonal Final 2026-10-11 +1.2 °C 82 % PDF
August 2026 Monthly Final 2026-10-11 +1.7 °C 62 % PDF
July 2026 Monthly Final 2026-10-11 +1.1 °C 76 % PDF
June 2026 Monthly Final 2026-10-11 +0.8 °C 116 % PDF
May 2026 Monthly Final 2026-10-11 +1.0 °C 114 % PDF
April 2026 Monthly Final 2026-10-11 +1.4 °C 121 % PDF
March 2026 Monthly Final 2026-10-11 +2.4 °C 96 % PDF
February 2026 Monthly Final 2026-10-11 +2.0 °C 46 % PDF
January 2026 Monthly Final 2026-10-11 +1.1 °C 90 % PDF
Year 2025 Annual Final 2026-10-11 +1.1 °C 99 % PDF