Windsor weather in September 2025

Expect 19°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Windsor in September. Check more long-term weather averages for Windsor in September before you book your next holiday to England in 2025/2026.

  • 19°C maximum daytime temperature in September in Windsor19
    19°C max day temperature
  • 5 hours of sunshine per day
  • 12 days with some rainfall in September in Windsor12
    12 days with some rainfall
  • 10°C minimum night-time temperature in September in Windsor10
    10°C min night temperature
  • 13 hours of daylight per day in September in Windsor13
    13 hours of daylight per day
  • No heat & humidity in September in Windsor0
    No heat & humidity
  • 57 mm monthly rainfall in September in Windsor57
    57 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Windsor4
    4 (Moderate) UV index

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The September weather guide for England (Windsor) 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)

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More about England

How hot is it in Windsor in September?

Daytime temperatures usually reach 19°C in Windsor in September, falling to 10°C at night.

How sunny is it in Windsor in September?

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

Does it rain in Windsor in September?

There are usually 12 days with some rain in Windsor in September and the average monthly rainfall is 57mm.

Windsor September sunrise & sunset times

Browse the sunrise and sunset times for Windsor in September 2025. Select a month to view Windsor sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:15 18:48
Monday, 15th September 2025 05:38 18:16
Tuesday, 30th September 2025 06:02 17:42

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