Brest weather in September 2025

Expect 19°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Brest in September. Check more long-term weather averages for Brest in September before you book your next holiday to France in 2025/2026.

  • 19°C maximum daytime temperature in September in Brest19
    19°C max day temperature
  • 6 hours of sunshine per day
  • 15 days with some rainfall in September in Brest15
    15 days with some rainfall
  • 12°C minimum night-time temperature in September in Brest12
    12°C min night temperature
  • 13 hours of daylight per day in September in Brest13
    13 hours of daylight per day
  • No heat & humidity in September in Brest0
    No heat & humidity
  • 88 mm monthly rainfall in September in Brest88
    88 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Brest4
    4 (Moderate) UV index
  • 16°C sea temperature in September in Brest16
    16°C sea temperature

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The September weather guide for France (Brest) 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 France

How hot is it in Brest in September?

Daytime temperatures usually reach 19°C in Brest in September, falling to 12°C at night.

How sunny is it in Brest in September?

There are normally 6 hours of bright sunshine each day in Brest in September - that's 44% of daylight hours.

How warm is the sea around Brest in September?

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

Does it rain in Brest in September?

There are usually 15 days with some rain in Brest in September and the average monthly rainfall is 88mm.

Brest September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:36 19:59
Monday, 15th September 2025 06:55 19:30
Tuesday, 30th September 2025 07:16 18:59

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