Weather in Polk County, Iowa for September 2025
Until now, September 2025 in Polk County is cooler than usual, with temperatures averaging 25.4 °F, this is -4 °F below the typical seasonal average.
The forecast for the next days in Polk County predicts temperatures to be around 30 °F, close to the historical average.
In general, the average temperature in Polk County at the beginning of September is 28.1 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 31.3 °F by the end of September.
Polk County experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 71.3 mm.
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Polk County Weather September
Temperatures trend during September in Polk County
September weather in Polk County day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 29° /13° | 0 mm | 7 | |
| Sept. 2 | Sunny | 30° /12° | 0 mm | 7 | |
| Sept. 3 | Sunny | 29° /13° | 22.2 mm | 7 | |
| Sept. 4 |  Mist | 30° /13° | 0 mm | 7 | |
| Sept. 5 |  Thundery outbreaks possible | 31° /17° | 0.5 mm | 7 | |
| Sept. 6 |  Overcast | 24° /11° | 0 mm | 6 | |
| Sept. 7 | Sunny | 24° /7° | 0 mm | 6 | |
| Sept. 8 |  Cloudy | 28° /10° | 0 mm | 7 | |
| Sept. 9 |  Partly cloudy | 31° /12° | 0 mm | 8 | |
| Sept. 10 | Overcast | 30° /16° | 0.4 mm | 7 | |
| Sept. 11 |  Heavy rain | 30° /16° | 9 mm | 7 | |
| Sept. 12 | Sunny | 32° /14° | 0 mm | 7 | |
| Sept. 13 | Partly cloudy | 31° /16° | 0 mm | 7 | |
| Sept. 14 | Partly cloudy | 32° /15° | 0 mm | 8 | |
| Sept. 15 | Overcast | 30° /16° | 0 mm | 7 | |
| Sept. 16 |  Patchy rain possible | 35° /20° | 1.7 mm | 1.1 | |
| Sept. 17 |  Moderate rain | 34° /19° | 11.3 mm | 1.4 | |
| Sept. 18 | Patchy rain possible | 28° /17° | 1.4 mm | 0.4 | |
| Sept. 19 | Moderate rain | 27° /16° | 7.5 mm | 1.1 | |
| Sept. 20 | Moderate rain | 27° /15° | 6.9 mm | 0 | |
| Sept. 21 | Patchy rain possible | 29° /18° | 1.9 mm | 5 | |
| Sept. 22 | Moderate rain | 27° /19° | 15.7 mm | 5 | |
| Sept. 23 | Sunny | 25° /13° | 0 mm | 5 | |
| Sept. 24 | Sunny | 29° /14° | 0 mm | 6 | |
| Sept. 25 | Sunny | 30° /17° | 0 mm | 6 | |
| Sept. 26 | Patchy rain possible | 32° /22° | 1.6 mm | 6 | |
| Sept. 27 | Patchy rain possible | 34° /20° | 1 mm | 6 | |
| Sept. 28 | Moderate rain | 30° /21° | 7.7 mm | 6 | |
| Sept. 29 | Partly cloudy | 32° /14° | 0 mm | 8 | |
| Sept. 30 |  Patchy light rain with thunder | 32° /15° | 2 mm | 7 | |
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Polk County in September - FAQ
September rainfall patterns in Polk County
UV exposure in Polk County during September
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Where is Polk County?Get accurate weather forecasts for Polk County, located at latitude 41.601 and longitude -93.609. Stay updated with localized weather information tailored for Polk County.