The temperatures in Wisconsin in September are comfortable with low of 59°F and and high up to 69°F.
You can expect about 3 to 8 days of rain in Wisconsin 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 Wisconsin in September 2025.
If you’re planning to visit Wisconsin in the near future, we highly recommend that you review the 14 day weather forecast for Wisconsin before you arrive.
Temperatures
69° / 59°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
3.43
in
Sun Hours
10.6
Hrs
