🌤️ September 2026 Weather Summary

September produced an average temperature of 15.7°C, with a wide range between the warmest and coolest days. The highest temperature was 26.8°C on 22 September, while the lowest was 5.4°C on 10 September.

The month started with several pleasantly warm days, including 24.2°C on the 6th and 23.3°C on the 13th. There was then another particularly warm spell around 21–22 September, when temperatures reached 26.8°C.

Towards the final week, temperatures became noticeably cooler, with overnight lows regularly falling into the 6–9°C range. The lowest daytime mean temperatures were recorded towards the end of the month, giving a clear indication that autumn was beginning to take hold.

🌧️ Rainfall

September was a relatively dry month, with only 19.0 mm of rain recorded.

Rain fell on 15 days, although most of these were small amounts:

• 15 days with more than 1 mm
• 3 days with more than 2 mm
• No days with more than 20 mm
• The wettest day was 4 September, with 5.79 mm

So although there were quite a few days when some rain was recorded, there was no prolonged period of heavy rainfall, and the overall total was quite low.

💨 Wind

Winds were generally light throughout the month, averaging just 1.1 mph. The strongest recorded wind speed was 29 mph on 4 September.

The wind direction was predominantly westerly, with occasional variations to WSW, WNW and ENE.

🌡️ Overall impression

September 2026 was a mild but rather dry month. There was still some summer warmth during the first three weeks, culminating in the month’s high of 26.8°C on 22 September, but temperatures gradually declined as the month progressed.

The relatively low rainfall of 19 mm meant that the ground remained comparatively dry, while the increasingly cool nights towards the end of the month marked the transition into autumn.

Key figures for September 2026: