Scilly Isles weather in September 2026

Q: How warm is it in Scilly Isles in September?

Daytime temperatures usually reach 17°C in Scilly Isles in September, falling to 11°C at night.

Q: How sunny is it in Scilly Isles in September?

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

Q: How warm is the sea around Scilly Isles in September?

The average sea temperature around Scilly Isles in September is 16°C.

Q: Does it rain in Scilly Isles in September?

There are usually 15 days with some rain in Scilly Isles in September and the average monthly rainfall is 89mm.

Expect daytime maximum temperatures of 63°F in Scilly Isles, England in September based on long-term weather averages. There are 5 hours of sunshine per day on average with 15 days with some rainfall and typically 3.5 inches of rainfall in the month.

63
63°F max day temperature
5
5 hours of sunshine per day
15
15 days with some rainfall
52
52°F min night temperature
13
13 hours of daylight per day
0
No heat & humidity
3.5
3.5 inches of monthly rainfall
4
4 (Moderate) UV index
61
61°F sea temperature

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The September weather guide for England (Scilly Isles) 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) | Imperial (°F)

More about England

How warm is it in Scilly Isles in September?

Daytime temperatures usually reach 63°F in Scilly Isles in September, falling to 52°F at night.

How sunny is it in Scilly Isles in September?

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

How warm is the sea around Scilly Isles in September?

The average sea temperature around Scilly Isles in September is 61°F.

Does it rain in Scilly Isles in September?

There are usually 15 days with some rain in Scilly Isles in September and the average monthly rainfall is 3.5 inches.

Scilly Isles September sunrise & sunset times

Browse the sunrise and sunset times for Scilly Isles in September 2026. Select a month to view Scilly Isles sunrise and sunset times for the next 12 months.

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