The temperatures in La Rochelle in September are comfortable with low of 59°F and and high up to 71°F.
You can expect about 3 to 8 days of rain in La Rochelle during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in La Rochelle in September 2025.
If you’re planning to visit La Rochelle in the near future, we highly recommend that you review the 14 day weather forecast for La Rochelle before you arrive.
Temperatures
71° / 59°
Rainy Days
4
Snowy Days
0
Dry Days
26
Rainfall
2.6
in
Sun Hours
10.9
Hrs
