Weather in Willmar, Minnesota for September 2025
Until now, September 2025 in Willmar is cooler than usual, with temperatures averaging 20.6 °F, this is -2.8 °F below the typical seasonal average.
The forecast for the coming days of September 2025 predicts a temperature of 28.1 °F , which is warmer than usual.
In general, the average temperature in Willmar at the beginning of September is 20.4 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 30.1 °F by the end of September.
Willmar experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 53 mm.
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Willmar Weather September
Temperatures trend during September in Willmar
September weather in Willmar day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Overcast | 21° /13° | 3.4 mm | 5 | |
| Sept. 2 |  Sunny | 23° /12° | 5.7 mm | 6 | |
| Sept. 3 | Sunny | 22° /12° | 0.6 mm | 6 | |
| Sept. 4 | Sunny | 22° /8° | 11.8 mm | 6 | |
| Sept. 5 |  Partly cloudy | 18° /12° | 0.1 mm | 5 | |
| Sept. 6 | Partly cloudy | 17° /7° | 0 mm | 5 | |
| Sept. 7 | Sunny | 20° /5° | 0 mm | 6 | |
| Sept. 8 | Sunny | 26° /9° | 0 mm | 7 | |
| Sept. 9 | Sunny | 25° /16° | 0 mm | 7 | |
| Sept. 10 |  Patchy rain possible | 27° /17° | 0.7 mm | 6 | |
| Sept. 11 | Sunny | 27° /14° | 0 mm | 7 | |
| Sept. 12 | Sunny | 28° /16° | 15.7 mm | 7 | |
| Sept. 13 | Sunny | 28° /18° | 0 mm | 7 | |
| Sept. 14 | Overcast | 30° /18° | 0 mm | 7 | |
| Sept. 15 | Sunny | 29° /20° | 0 mm | 1.3 | |
| Sept. 16 | Patchy rain possible | 32° /16° | 0.5 mm | 1.3 | |
| Sept. 17 |  Heavy rain | 32° /20° | 40 mm | 1.2 | |
| Sept. 18 |  Moderate rain | 25° /17° | 18.5 mm | 0.6 | |
| Sept. 19 | Moderate rain | 22° /17° | 13.3 mm | 0 | |
| Sept. 20 | Patchy rain possible | 21° /15° | 1.2 mm | 4 | |
| Sept. 21 | Sunny | 24° /14° | 0 mm | 5 | |
| Sept. 22 | Patchy rain possible | 27° /16° | 0.3 mm | 5 | |
| Sept. 23 | Sunny | 25° /14° | 0 mm | 5 | |
| Sept. 24 | Partly cloudy | 31° /16° | 0 mm | 6 | |
| Sept. 25 | Patchy rain possible | 32° /20° | 0.6 mm | 6 | |
| Sept. 26 | Sunny | 29° /17° | 0 mm | 6 | |
| Sept. 27 | Patchy rain possible | 33° /17° | 0.1 mm | 5 | |
| Sept. 28 | Sunny | 31° /20° | 0 mm | 6 | |
| Sept. 29 | Light rain shower | 28° /14° | 6.3 mm | 7 | |
| Sept. 30 |  Fog | 27° /14° | 1 mm | 7 | |
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Willmar in September - FAQ
September rainfall patterns in Willmar
UV exposure in Willmar during September
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Where is Willmar?Get accurate weather forecasts for Willmar, located at latitude 45.122 and longitude -95.043. Stay updated with localized weather information tailored for Willmar.