The temperatures in Thetford Mines in September are quite cold with temperatures between 8°C and 19°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Thetford Mines 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 Thetford Mines in September 2025.
If you’re planning to visit Thetford Mines in the near future, we highly recommend that you review the 14 day weather forecast for Thetford Mines before you arrive.
Temperatures
19° / 8°
Rainy Days
7
Snowy Days
0
Dry Days
23
Rainfall
145
mm
Sun Hours
9.0
Hrs
