Cowes weather in September 2025

Q: How hot is it in Cowes in September?

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

Q: How sunny is it in Cowes in September?

There are normally 5 hours of bright sunshine each day in Cowes in September - that's 42% of daylight hours.

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

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

Q: Does it rain in Cowes in September?

There are usually 12 days with some rain in Cowes in September and the average monthly rainfall is 67mm.

Expect daytime maximum temperatures of 18°C in Cowes, 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 67 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
67
67 mm of monthly rainfall
4
4 (Moderate) UV index
17
17°C sea temperature

More about Cowes

Cowes by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for England

Avis sale: up to 10% off car hire

Sale

Save up to 10% on car hire for select destinations
Book car hire in Europe, Australia, New Zealand & more
Travel: 1 Mar-14 Dec 2025. Black out periods apply

Go to Avis deal >>

Expires at 23:59 on Tuesday 18th Mar 2025 · View all Avis offers

Car hire finder

Destination

The September weather guide for England (Cowes) 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)