The temperatures in Iserlohn 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 Iserlohn 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 Iserlohn in September 2026.
If you’re planning to visit Iserlohn in the near future, we highly recommend that you review the 14 day weather forecast for Iserlohn before you arrive.
Temperatures
19° / 11°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
75
mm
Sun Hours
9.6
Hrs
