Sandown weather in September 2025

Q: How hot is it in Sandown in September?

Daytime temperatures usually reach 18°C in Sandown in September, falling to 12°C at night.

Q: How sunny is it in Sandown in September?

There are normally 5 hours of bright sunshine each day in Sandown in September - that's 43% of daylight hours.

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

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

Q: Does it rain in Sandown in September?

There are usually 12 days with some rain in Sandown in September and the average monthly rainfall is 63mm.

Expect daytime maximum temperatures of 18°C in Sandown, England in September based on long-term weather averages. There are 5 hours of sunshine per day on average with 12 days with some rainfall and typically 63 mm of rainfall in the month.

18
18°C max day temperature
5
5 hours of sunshine per day
12
12 days with some rainfall
12
12°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
63
63 mm of monthly rainfall
4
4 (Moderate) UV index
17
17°C sea temperature

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The September weather guide for England (Sandown) 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)