The temperatures in Mont Saint Michel in September are comfortable with low of 12°C and and high up to 23°C.
You can expect about 3 to 8 days of rain in Mont Saint Michel 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 Mont Saint Michel in September 2026.
If you’re planning to visit Mont Saint Michel in the near future, we highly recommend that you review the 14 day weather forecast for Mont Saint Michel before you arrive.
Temperatures
23° / 12°
Rainy Days
3
Snowy Days
0
Dry Days
27
Rainfall
50
mm
Sun Hours
10.2
Hrs
