Greater London weather in September 2025

Q: 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.

Q: 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.

Q: 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.

Expect daytime maximum temperatures of 66°F in Greater London, UK in September based on long-term weather averages. There are 5 hours of sunshine per day on average with 11 days with some rainfall and typically 2.2 inches of rainfall in the month.

66
66°F max day temperature
5
5 hours of sunshine per day
11
11 days with some rainfall
52
52°F min night temperature
13
13 hours of daylight per day
0
No heat & humidity
2.2
2.2 inches of monthly rainfall
4
4 (Moderate) UV index

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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) | Imperial (°F)

More about the UK

How hot is it in Greater London in September?

Daytime temperatures usually reach 66°F in London, Greater London in September, falling to 52°F 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 2.2 inches.

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.

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