Dorset weather in September 2025

Q: How hot is it in Dorset in September?

Daytime temperatures usually reach 18°C in Bournemouth, Dorset in September, falling to 10°C at night.

Q: How sunny is it in Dorset in September?

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

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

The average sea temperature around Bournemouth, Dorset in September is 17°C.

Q: Does it rain in Dorset in September?

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

Expect 18°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Dorset in September. Check more long-term weather averages for Dorset in September before you book your next holiday to Dorset in 2025/2026.

18
18°C max day temperature
5
5 hours of sunshine per day
12
12 days with some rainfall
10
10°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

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The September weather guide for Dorset (Bournemouth) 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.

Top Dorset destinations

Below are average maximum temperatures at popular countries, regions and places in Dorset in September. Select a holiday destination to see more weather parameters.

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

More about the UK

How hot is it in Dorset in September?

Daytime temperatures usually reach 18°C in Bournemouth, Dorset in September, falling to 10°C at night.

How sunny is it in Dorset in September?

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

How warm is the sea around Dorset in September?

The average sea temperature around Bournemouth, Dorset in September is 17°C.

Does it rain in Dorset in September?

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

Dorset September sunrise & sunset times

Browse the sunrise and sunset times for Dorset in September 2025. Select a month to view Dorset sunrise and sunset times for the next 12 months. The Dorset sunrise and sunset times shown below are for Bournemouth.

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