The temperatures in Saint Etienne in September are quite cold with temperatures between 9°C and 21°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Saint Etienne 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 Saint Etienne in September 2025.
If you’re planning to visit Saint Etienne in the near future, we highly recommend that you review the 14 day weather forecast for Saint Etienne before you arrive.
Temperatures
21° / 9°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
83
mm
Sun Hours
10.3
Hrs
