St Ives weather in September 2025

Expect 17°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in St Ives in September. Check more long-term weather averages for St Ives in September before you book your next holiday to England in 2025/2026.

  • 17°C maximum daytime temperature in September in St Ives17
    17°C max day temperature
  • 5 hours of sunshine per day
  • 16 days with some rainfall in September in St Ives16
    16 days with some rainfall
  • 11°C minimum night-time temperature in September in St Ives11
    11°C min night temperature
  • 13 hours of daylight per day in September in St Ives13
    13 hours of daylight per day
  • No heat & humidity in September in St Ives0
    No heat & humidity
  • 83 mm monthly rainfall in September in St Ives83
    83 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in St Ives4
    4 (Moderate) UV index
  • 16°C sea temperature in September in St Ives16
    16°C sea temperature

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The September weather guide for England (St Ives) 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)

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More about England

How warm is it in St Ives in September?

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

How sunny is it in St Ives in September?

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

How warm is the sea around St Ives in September?

The average sea temperature around St Ives in September is 16°C.

Does it rain in St Ives in September?

There are usually 16 days with some rain in St Ives in September and the average monthly rainfall is 83mm.

St Ives September sunrise & sunset times

Browse the sunrise and sunset times for St Ives in September 2025. Select a month to view St Ives sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:37 19:06
Monday, 15th September 2025 05:58 18:35
Tuesday, 30th September 2025 06:21 18:02

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