Brest weather in September 2026

Expect daytime maximum temperatures of 19°C in Brest, France in September based on long-term weather averages. There are 6 hours of sunshine per day on average with 15 days with some rainfall and typically 88 mm of rainfall in the month.

  • 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 20°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 46% of daylight hours.

Does it rain in Brest in September?

There are usually 12 days with some rain in Brest in September and the average monthly rainfall is 57mm.

Brest September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st September 2026 06:35 20:00
Tuesday, 15th September 2026 06:55 19:31
Wednesday, 30th September 2026 07:16 18:59

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