Wisconsin (Milwaukee)
September
Weather in Wisconsin for September 2025
Your guide to Wisconsin weather in September - trends and predictions
In general, the average temperature in Wisconsin at the beginning of September is 27.7 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.6 °F by the end of September.
Wisconsin sees moderate rainfall in September, averaging 8 rainy days.
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22
Dry days
8
Rainy days
0
Snow days
25°/14°
Temperatures
18 km/h
Avg max wind
70 %
Avg humidity
Wisconsin in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  26° | 2  29° | 3  31° | 4  32° | 5 32° | 6  26° | 7 18° |
| 8 21° | 9 24° | 10 27° | 11  25° | 12 24° | 13 21° | 14 23° |
| 15 28° | 16 28° | 17 23° | 18 22° | 19  23° | 20 27° | 21 28° |
| 22 24° | 23 22° | 24 21° | 25 22° | 26 22° | 27 20° | 28 20° |
| 29 21° | 30 25° |
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Temperatures trend during September in Wisconsin
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Mist | 26° /13° | 0 mm | 7 | |
| Sept. 2 | Partly cloudy | 29° /14° | 0 mm | 8 | |
| Sept. 3 | Cloudy | 31° /15° | 0 mm | 7 | |
| Sept. 4 | Overcast | 32° /16° | 0 mm | 8 | |
| Sept. 5 | Overcast | 32° /19° | 2 mm | 8 | |
| Sept. 6 | Light rain shower | 26° /14° | 2.4 mm | 6 | |
| Sept. 7 | Overcast | 18° /9° | 0.8 mm | 5 | |
| Sept. 8 | Cloudy | 21° /8° | 0 mm | 6 | |
| Sept. 9 | Mist | 24° /12° | 0 mm | 6 | |
| Sept. 10 | Mist | 27° /11° | 0 mm | 7 | |
| Sept. 11 | Light rain | 25° /14° | 2.1 mm | 6 | |
| Sept. 12 | Overcast | 24° /13° | 0 mm | 6 | |
| Sept. 13 | Light rain shower | 21° /14° | 3.9 mm | 5 | |
| Sept. 14 | Mist | 23° /13° | 0 mm | 6 | |
| Sept. 15 | Mist | 28° /13° | 0 mm | 7 | |
| Sept. 16 | Patchy light drizzle | 28° /16° | 1.8 mm | 7 | |
| Sept. 17 | Light rain shower | 23° /14° | 1.8 mm | 6 | |
| Sept. 18 | Cloudy | 22° /11° | 0 mm | 5 | |
| Sept. 19 | Thundery outbreaks possible | 23° /14° | 0 mm | 5 | |
| Sept. 20 | Thundery outbreaks possible | 27° /15° | 0.1 mm | 6 | |
| Sept. 21 | Patchy rain possible | 28° /15° | 0 mm | 7 | |
| Sept. 22 | Mist | 24° /16° | 11.4 mm | 6 | |
| Sept. 23 | Fog | 22° /12° | 0 mm | 5 | |
| Sept. 24 | Overcast | 21° /13° | 0 mm | 5 | |
| Sept. 25 | Patchy rain possible | 22° /13° | 0.1 mm | 5 | |
| Sept. 26 | Light rain shower | 22° /14° | 15.1 mm | 5 | |
| Sept. 27 | Light rain shower | 20° /14° | 3.6 mm | 5 | |
| Sept. 28 | Patchy rain possible | 20° /15° | 0 mm | 5 | |
| Sept. 29 | Fog | 21° /14° | 0 mm | 5 | |
| Sept. 30 | Overcast | 25° /15° | 0 mm | 6 | |
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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.
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 14°. 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 63.7 mm spread over approximately 8 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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