Iowa (Des Moines)
September
Weather in Iowa for September 2027
Your guide to Iowa weather in September - trends and predictions
In general, the average temperature in Iowa at the beginning of September is 29.8 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 25.7 °C by the end of September.
Iowa experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 189.9 mm.
Is September a good time to visit Iowa? check out the best time to travel to Iowa page.
✨ Is September a good time to visit Iowa? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
21
Dry days
9
Rainy days
0
Snow days
28°/15°
Temperatures
20 km/h
Avg max wind
67 %
Avg humidity
Iowa Weather September
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What’s the Weather Like in Iowa This September?
Discover the average temperatures and weather trends across Iowa’s cities this September.
Temperatures trend during September in Iowa
See the weather trend as well as the moving average line
September weather in Iowa day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 31° /16° | 0 mm | 7 | |
| Sept. 2 | Sunny | 32° /15° | 0 mm | 7.9 | |
| Sept. 3 |  Moderate rain | 31° /16° | 16.7 mm | 7 | |
| Sept. 4 | Sunny | 32° /16° | 0 mm | 7 | |
| Sept. 5 |  Thundery outbreaks possible | 32° /19° | 0.4 mm | 7 | |
| Sept. 6 |  Light rain | 27° /14° | 3.2 mm | 6 | |
| Sept. 7 | Moderate rain | 25° /10° | 13.5 mm | 5 | |
| Sept. 8 |  Cloudy | 30° /12° | 0.7 mm | 6 | |
| Sept. 9 | Moderate rain | 30° /14° | 21.1 mm | 7 | |
| Sept. 10 |  Overcast | 29° /16° | 0.3 mm | 7 | |
| Sept. 11 | Light rain | 29° /16° | 6.8 mm | 7 | |
| Sept. 12 | Sunny | 30° /15° | 0.6 mm | 7 | |
| Sept. 13 | Light rain | 28° /16° | 4.3 mm | 6 | |
| Sept. 14 | Light rain | 31° /14° | 3.3 mm | 6 | |
| Sept. 15 | Light rain | 29° /17° | 4.9 mm | 6 | |
| Sept. 16 | Light rain | 27° /17° | 3.4 mm | 5 | |
| Sept. 17 | Light rain | 27° /16° | 8.5 mm | 5 | |
| Sept. 18 | Moderate rain | 28° /15° | 11.2 mm | 5 | |
| Sept. 19 |  Heavy rain at times | 27° /17° | 7.7 mm | 5 | |
| Sept. 20 | Thundery outbreaks possible | 23° /16° | 35.1 mm | 5 | |
| Sept. 21 | Moderate rain | 24° /15° | 16.3 mm | 5 | |
| Sept. 22 | Light rain | 22° /13° | 8.7 mm | 4 | |
| Sept. 23 |  Patchy rain possible | 24° /13° | 2.1 mm | 6 | |
| Sept. 24 |  Fog | 23° /13° | 0.9 mm | 4 | |
| Sept. 25 | Light rain | 24° /12° | 3.8 mm | 5 | |
| Sept. 26 | Light rain | 25° /13° | 4.3 mm | 5 | |
| Sept. 27 | Fog | 26° /13° | 0.5 mm | 5.6 | |
| Sept. 28 | Mist | 26° /13° | 0.1 mm | 5.5 | |
| Sept. 29 | Patchy rain possible | 28° /15° | 1.4 mm | 5.4 | |
| Sept. 30 |  Patchy light rain with thunder | 28° /16° | 10.1 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Iowa 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 forecast closer to your planned date for the most up-to-date weather information.
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Iowa in September - FAQ
What are the expected maximum and minimum temperatures in Iowa during September?
During September, expect a variety of temperatures with highs around 28° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Iowa during September?
Significant rainfall exceeding 189.9 mm is expected in Iowa during September, occurring over more than 9 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Iowa during September?
The average wind speed in Iowa during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Iowa
Explore the daily rainfall trends and prepare for Iowas September weather 💧
Typically, Iowa has 9 rainy days in September with a total of 189.9 mm of rainfall.
UV exposure in Iowa during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Counties in Iowa
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