The temperatures in Iowa City in September are comfortable with low of 55°F and and high up to 75°F.
You can expect about 3 to 8 days of rain in Iowa City 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 Iowa City in September 2025.
If you’re planning to visit Iowa City in the near future, we highly recommend that you review the 14 day weather forecast for Iowa City before you arrive.
Temperatures
75° / 55°
Rainy Days
6
Snowy Days
0
Dry Days
24
Rainfall
4.29
in
Sun Hours
10.5
Hrs
