Iowa City (IA)
September
Weather in Iowa City, Iowa for September 2026
Your guide to Iowa City weather in September - trends and predictions
In general, the average temperature in Iowa City at the beginning of September is 23 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 26 °C by the end of September.
With an average of 5 rainy days, Iowa City experiences minimal rainfall in September.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
25
Dry days
5
Rainy days
0
Snow days
26°/14°
Temperatures
17 km/h
Avg max wind
69 %
Avg humidity
Iowa City Weather September
Move between months or click on a day
Temperatures trend during September in Iowa City
See the weather trend as well as the moving average line
September weather in Iowa City day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 25° /14° | 0 mm | 7 | |
| Sept. 2 | Sunny | 24° /12° | 0 mm | 6 | |
| Sept. 3 |  Partly cloudy | 22° /11° | 15.6 mm | 5 | |
| Sept. 4 | Sunny | 24° /8° | 0 mm | 6 | |
| Sept. 5 | Partly cloudy | 26° /12° | 0 mm | 7 | |
| Sept. 6 |  Patchy rain possible | 20° /9° | 0.2 mm | 5 | |
| Sept. 7 | Sunny | 20° /5° | 0 mm | 6 | |
| Sept. 8 | Sunny | 24° /8° | 0 mm | 6 | |
| Sept. 9 | Sunny | 27° /11° | 0 mm | 7 | |
| Sept. 10 | Sunny | 27° /14° | 0 mm | 7 | |
| Sept. 11 | Sunny | 29° /15° | 0 mm | 7 | |
| Sept. 12 | Sunny | 30° /14° | 0 mm | 8 | |
| Sept. 13 |  Overcast | 31° /18° | 0.1 mm | 8 | |
| Sept. 14 | Partly cloudy | 33° /18° | 0.1 mm | 8 | |
| Sept. 15 |  Cloudy | 31° /19° | 0 mm | 7 | |
| Sept. 16 | Sunny | 30° /17° | 3 mm | 8 | |
| Sept. 17 | Sunny | 31° /14° | 0 mm | 8 | |
| Sept. 18 | Overcast | 30° /16° | 0 mm | 7 | |
| Sept. 19 | Overcast | 28° /17° | 10.2 mm | 6 | |
| Sept. 20 | Overcast | 24° /17° | 36.7 mm | 6 | |
| Sept. 21 | Patchy rain possible | 28° /17° | 0.1 mm | 7 | |
| Sept. 22 |  Moderate or heavy rain shower | 23° /15° | 7.8 mm | 6 | |
| Sept. 23 | Partly cloudy | 23° /12° | 0.6 mm | 6 | |
| Sept. 24 | Patchy rain possible | 21° /14° | 0.1 mm | 5 | |
| Sept. 25 | Overcast | 23° /10° | 0 mm | 5 | |
| Sept. 26 | Sunny | 28° /11° | 0 mm | 7 | |
| Sept. 27 | Partly cloudy | 27° /12° | 0 mm | 7 | |
| Sept. 28 | Sunny | 28° /14° | 0 mm | 7 | |
| Sept. 29 | Sunny | 28° /13° | 0 mm | 7 | |
| Sept. 30 | Overcast | 27° /14° | 0 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Iowa City in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Iowa City forecast closer to your planned date for the most up-to-date weather information.
Change Month
Iowa City in September - FAQ
What are the expected maximum and minimum temperatures in Iowa City during September?
Enjoy moderate daytime temperatures of up to 26° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Iowa City during September?
Moderate rainfall is anticipated in Iowa City during September, with a total of 74.3 mm spread over approximately 5 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Iowa City during September?
The average wind speed in Iowa City during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Iowa City
Explore the daily rainfall trends and prepare for Iowa Citys September weather 💧
Typically, Iowa City has 5 rainy days in September with a total of 74.3 mm of rainfall.
UV exposure in Iowa City during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Quick links
More Iowa City weather pages
You are here
Where is Iowa City?Get accurate weather forecasts for Iowa City, located at latitude 41.661 and longitude -91.53. Stay updated with localized weather information tailored for Iowa City.
Found a mistake?
We appreciate your attention to details. Tell us here.