The temperatures in Ilmenau in September are quite cold with temperatures between 9°C and 19°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Ilmenau 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 Ilmenau in September 2026.
If you’re planning to visit Ilmenau in the near future, we highly recommend that you review the 14 day weather forecast for Ilmenau before you arrive.
Temperatures
19° / 9°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
79
mm
Sun Hours
9.7
Hrs
