Polk County (Des Moines)
September
Weather in Polk County, Iowa for September 2027
Your guide to Polk County weather in September - trends and predictions
In general, the average temperature in Polk County 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.
Polk County 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 Polk County? check out the best time to travel to Polk County page.
✨ Is September a good time to visit Polk County? – 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
Polk County Weather September
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Temperatures trend during September in Polk County
See the weather trend as well as the moving average line
September weather in Polk County 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 Polk County 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 Polk County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Polk County in September - FAQ
What are the expected maximum and minimum temperatures in Polk County 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 Polk County during September?
Significant rainfall exceeding 189.9 mm is expected in Polk County during September, occurring over more than 9 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Polk County during September?
The average wind speed in Polk County during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Polk County
Explore the daily rainfall trends and prepare for Polk Countys September weather 💧
Typically, Polk County has 9 rainy days in September with a total of 189.9 mm of rainfall.
UV exposure in Polk County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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