London weather in September 2021

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  • 19°C maximum daytime temperature in September in London19
    19°C max day temperature
  • 5 hours of sunshine per day
  • 11 days with some rainfall in September in London11
    11 days with some rainfall
  • 11°C minimum night-time temperature in September in London11
    11°C min night temperature
  • 13 hours of daylight per day in September in London13
    13 hours of daylight per day
  • No heat & humidity in September in London0
    No heat & humidity
  • 55 mm monthly rainfall in September in London55
    55 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in London4
    4 (Moderate) UV index
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The September weather guide for London, England 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.

How hot is it in London in September?

Daytime temperatures usually reach 19°C in London in September, falling to 11°C at night.

How sunny is it in London in September?

There are normally 5 hours of bright sunshine each day in London in September - that's 37% of daylight hours.

Does it rain in London in September?

There are usually 11 days with some rain in London in September and the average monthly rainfall is 55mm.

Metric (°C / mm)  |  Imperial (°F / inches)

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London sunrise & sunset times for September 2021

Browse the sunrise and sunset times for London in September 2021. Select a month to view London sunrise & sunset times for the next 12 months.


Date Sunrise times Sunset times
Wednesday, 1st September 2021 06:13 19:47
Wednesday, 15th September 2021 06:36 19:15
Thursday, 30th September 2021 07:00 18:40
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