The temperatures in Mons in September are usually low and can range between 11°C and 20°C.
You can expect about 3 to 8 days of rain in Mons 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 Mons in September 2025.
If you’re planning to visit Mons in the near future, we highly recommend that you review the 14 day weather forecast for Mons before you arrive.
Temperatures
20° / 11°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
66
mm
Sun Hours
9.8
Hrs
