The temperatures in Brest in September are usually low and can range between 14°C and 19°C.
You can expect about 3 to 8 days of rain in Brest 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 Brest in September 2025.
If you’re planning to visit Brest in the near future, we highly recommend that you review the 14 day weather forecast for Brest before you arrive.
Temperatures
19° / 14°
Rainy Days
4
Snowy Days
0
Dry Days
26
Rainfall
59
mm
Sun Hours
9.8
Hrs
