The temperatures in Hamm in September are usually low and can range between 11°C and 19°C.
You can expect about 3 to 8 days of rain in Hamm 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 Hamm in September 2025.
If you’re planning to visit Hamm in the near future, we highly recommend that you review the 14 day weather forecast for Hamm before you arrive.
Temperatures
19° / 11°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
71
mm
Sun Hours
9.8
Hrs
