La Rochelle weather in September 2025

Expect 72°F daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in La Rochelle in September. Check more long-term weather averages for La Rochelle in September before you book your next holiday to France in 2025/2026.

  • 72°F maximum daytime temperature in September in La Rochelle72
    72°F max day temperature
  • 7 hours of sunshine per day
  • 12 days with some rainfall in September in La Rochelle12
    12 days with some rainfall
  • 55°F minimum night-time temperature in September in La Rochelle55
    55°F min night temperature
  • 13 hours of daylight per day in September in La Rochelle13
    13 hours of daylight per day
  • No heat & humidity in September in La Rochelle0
    No heat & humidity
  • 2.8 inches monthly rainfall in September in La Rochelle2.8
    2.8 inches of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in La Rochelle5
    5 (Moderate) UV index
  • 66°F sea temperature in September in La Rochelle66
    66°F sea temperature

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The September weather guide for France (La Rochelle) 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)

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More about France

How hot is it in La Rochelle in September?

Daytime temperatures usually reach 72°F in La Rochelle in September, falling to 55°F at night.

How sunny is it in La Rochelle in September?

There are normally 7 hours of bright sunshine each day in La Rochelle in September - that's 57% of daylight hours.

How warm is the sea around La Rochelle in September?

The average sea temperature around La Rochelle in September is 66°F.

Does it rain in La Rochelle in September?

There are usually 12 days with some rain in La Rochelle in September and the average monthly rainfall is 2.8 inches.

La Rochelle September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:25 19:43
Monday, 15th September 2025 06:43 19:16
Tuesday, 30th September 2025 07:02 18:46

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