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La Rochelle weather in September 2025
Expect 22°C 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.
- 22°C max day temperature
22 - 7 hours of sunshine per day
- 12 days with some rainfall
12 - 13°C min night temperature
13 - 13 hours of daylight per day
13 - No heat & humidity
0 - 70 mm of monthly rainfall
70 - 5 (Moderate) UV index
5 - 19°C sea temperature
19
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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 / mm) | Imperial (°F / inches)
More about France
How hot is it in La Rochelle in September?
Daytime temperatures usually reach 22°C in La Rochelle in September, falling to 13°C 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 19°C.
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 70mm.
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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