Wisconsin (Madison)
September
Weather in Wisconsin for September 2025
Your guide to Wisconsin weather in September - trends and predictions
Until now, September 2025 in Wisconsin is cooler than usual, with temperatures averaging 20.4 °F, this is -3.9 °F below the typical seasonal average.
Expect cooler weather in the next days in Wisconsin with the forecast suggesting a temperature of 22.9 °F, lower than the historical average.
In general, the average temperature in Wisconsin at the beginning of September is 24.6 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.7 °F by the end of September.
Wisconsin experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 61.4 mm.
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Temperatures
Rain 🌧️
More
20
Dry days
10
Rainy days
0
Snow days
25°/12°
Temperatures
18 km/h
Avg max wind
70 %
Avg humidity
Wisconsin Weather September
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What’s the Weather Like in Wisconsin This September?
Discover the average temperatures and weather trends across Wisconsin’s cities this September.
Temperatures trend during September in Wisconsin
See the weather trend as well as the moving average line
September weather in Wisconsin day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Mist | 25° /10° | 0 mm | 6 | |
| Sept. 2 |  Partly cloudy | 27° /12° | 0 mm | 7 | |
| Sept. 3 |  Cloudy | 27° /12° | 2.6 mm | 6 | |
| Sept. 4 |  Sunny | 26° /11° | 0 mm | 6 | |
| Sept. 5 | Partly cloudy | 26° /14° | 0.8 mm | 7 | |
| Sept. 6 | Mist | 21° /8° | 0.2 mm | 5 | |
| Sept. 7 |  Overcast | 20° /6° | 0.7 mm | 5 | |
| Sept. 8 | Mist | 22° /6° | 0 mm | 5 | |
| Sept. 9 | Overcast | 25° /9° | 0 mm | 6 | |
| Sept. 10 | Cloudy | 26° /12° | 0 mm | 6 | |
| Sept. 11 |  Light rain | 23° /12° | 1.3 mm | 5 | |
| Sept. 12 | Mist | 24° /11° | 0 mm | 6 | |
| Sept. 13 | Mist | 24° /13° | 0 mm | 5 | |
| Sept. 14 | Mist | 27° /12° | 0 mm | 6 | |
| Sept. 15 | Sunny | 28° /15° | 0 mm | 1.4 | |
| Sept. 16 | Sunny | 30° /14° | 0 mm | 1.4 | |
| Sept. 17 | Partly cloudy | 30° /16° | 0 mm | 1.4 | |
| Sept. 18 | Partly cloudy | 28° /17° | 0 mm | 1.3 | |
| Sept. 19 |  Moderate rain | 23° /16° | 9.6 mm | 0 | |
| Sept. 20 |  Patchy rain possible | 23° /15° | 4.7 mm | 4 | |
| Sept. 21 | Patchy rain possible | 21° /16° | 1.1 mm | 4 | |
| Sept. 22 | Patchy rain possible | 24° /15° | 3.4 mm | 4 | |
| Sept. 23 | Patchy rain possible | 19° /14° | 4.2 mm | 4 | |
| Sept. 24 | Cloudy | 20° /11° | 0.1 mm | 3 | |
| Sept. 25 | Patchy rain possible | 19° /12° | 0.2 mm | 3 | |
| Sept. 26 | Patchy rain possible | 20° /12° | 0.2 mm | 3 | |
| Sept. 27 | Sunny | 21° /10° | 0 mm | 4 | |
| Sept. 28 | Patchy rain possible | 14° /11° | 2.6 mm | 3 | |
| Sept. 29 | Fog | 24° /10° | 0 mm | 6 | |
| Sept. 30 | Overcast | 27° /13° | 0 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Wisconsin 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 Wisconsin forecast closer to your planned date for the most up-to-date weather information.
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Wisconsin in September - FAQ
What are the expected maximum and minimum temperatures in Wisconsin during September?
Enjoy moderate daytime temperatures of up to 25° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Wisconsin during September?
Moderate rainfall is anticipated in Wisconsin during September, with a total of 61.4 mm spread over approximately 10 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Wisconsin during September?
The average wind speed in Wisconsin during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Wisconsin
Explore the daily rainfall trends and prepare for Wisconsins September weather 💧
UV exposure in Wisconsin during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Top locations in Wisconsin
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