Dover weather in September 2025

Q: How hot is it in Dover in September?

Daytime temperatures usually reach 18°C in Dover in September, falling to 11°C at night.

Q: How sunny is it in Dover in September?

There are normally 5 hours of bright sunshine each day in Dover in September - that's 41% of daylight hours.

Q: How warm is the sea around Dover in September?

The average sea temperature around Dover in September is 17°C.

Q: Does it rain in Dover in September?

There are usually 11 days with some rain in Dover in September and the average monthly rainfall is 73mm.

Expect daytime maximum temperatures of 18°C in Dover, England 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 73 mm of rainfall in the month.

18
18°C max day temperature
5
5 hours of sunshine per day
11
11 days with some rainfall
11
11°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
73
73 mm of monthly rainfall
4
4 (Moderate) UV index
17
17°C sea temperature

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The September weather guide for England (Dover) 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)