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Greater London weather in September 2025
Expect 19°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Greater London in September. Check more long-term weather averages for Greater London in September before you book your next holiday to Greater London in 2025/2026.
- 1919°C max day temperature
- 5 hours of sunshine per day
- 1111 days with some rainfall
- 1111°C min night temperature
- 1313 hours of daylight per day
- 0No heat & humidity
- 5555 mm of monthly rainfall
- 44 (Moderate) UV index
More about Greater London
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The September weather guide for Greater London (London) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
More about the UK
How hot is it in Greater London in September?
Daytime temperatures usually reach 19°C in London, Greater London in September, falling to 11°C at night.
How sunny is it in Greater London in September?
There are normally 5 hours of bright sunshine each day in London, Greater London in September - that's 37% of daylight hours.
Does it rain in Greater London in September?
There are usually 11 days with some rain in London, Greater London in September and the average monthly rainfall is 55mm.
Greater London September sunrise & sunset times
Browse the sunrise and sunset times for Greater London in September 2025. Select a month to view Greater London sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Monday, 1st September 2025 | 05:13 | 18:46 |
Monday, 15th September 2025 | 05:36 | 18:15 |
Tuesday, 30th September 2025 | 06:00 | 17:40 |
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