Milwaukee (WI)
September
Weather in Milwaukee, Wisconsin for September 2026
Your guide to Milwaukee weather in September - trends and predictions
So far, September 2026 in Milwaukee shows a warmer trend than usual by 3.8 °F.
Expect cooler weather in the next days in Milwaukee with the forecast suggesting a temperature of 22.4 °F, lower than the historical average.
In general, the average temperature in Milwaukee at the beginning of September is 26.4 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 22.4 °F by the end of September.
The climate of Milwaukee in September is notably wet, with an average of 12 rainy days, and a total of 69.6 mm of precipitation.
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Temperatures
Rain 🌧️
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18
Dry days
12
Rainy days
0
Snow days
24°/14°
Temperatures
16 km/h
Avg max wind
72 %
Avg humidity
Milwaukee Weather September
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Temperatures trend during September in Milwaukee
See the weather trend as well as the moving average line
September weather in Milwaukee day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 28° /14° | 0 mm | 6 | |
| Sept. 2 | Sunny | 28° /15° | 0.1 mm | 6 | |
| Sept. 3 |  Cloudy | 28° /16° | 35.4 mm | 5 | |
| Sept. 4 |  Overcast | 29° /15° | 5.8 mm | 5 | |
| Sept. 5 | Overcast | 27° /16° | 1 mm | 5 | |
| Sept. 6 |  Light rain shower | 24° /12° | 1.2 mm | 6 | |
| Sept. 7 | Overcast | 21° /9° | 0.4 mm | 5 | |
| Sept. 8 | Cloudy | 23° /9° | 0 mm | 4 | |
| Sept. 9 |  Mist | 25° /14° | 6.8 mm | 5 | |
| Sept. 10 | Mist | 26° /13° | 0 mm | 6 | |
| Sept. 11 | Sunny | 25° /14° | 0 mm | 6.4 | |
| Sept. 12 | Overcast | 29° /18° | 0.1 mm | 6.3 | |
| Sept. 13 | Overcast | 22° /15° | 0 mm | 5.4 | |
| Sept. 14 | Overcast | 21° /15° | 3.1 mm | 2.7 | |
| Sept. 15 | Light rain shower | 27° /19° | 15.7 mm | 6 | |
| Sept. 16 | Light rain shower | 19° /15° | 21.1 mm | 4 | |
| Sept. 17 | Overcast | 17° /12° | 0 mm | 5 | |
| Sept. 18 | Sunny | 18° /10° | 0 mm | 5 | |
| Sept. 19 | Sunny | 22° /11° | 0 mm | 6 | |
| Sept. 20 | Sunny | 23° /14° | 0 mm | 6 | |
| Sept. 21 | Sunny | 22° /15° | 0 mm | 6 | |
| Sept. 22 | Sunny | 23° /15° | 0 mm | 6 | |
| Sept. 23 | Overcast | 24° /17° | 0 mm | 6 | |
| Sept. 24 | Overcast | 21° /16° | 13.5 mm | 5 | |
| Sept. 25 | Patchy rain possible | 21° /13° | 0 mm | 5 | |
| Sept. 26 | Fog | 24° /13° | 10.1 mm | 5 | |
| Sept. 27 | Fog | 23° /15° | 2.4 mm | 5 | |
| Sept. 28 | Patchy rain possible | 21° /15° | 0 mm | 5 | |
| Sept. 29 | Fog | 22° /14° | 0 mm | 5 | |
| Sept. 30 | Overcast | 25° /15° | 0 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Milwaukee 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 Milwaukee forecast closer to your planned date for the most up-to-date weather information.
Change Month
Milwaukee in September - FAQ
What are the expected maximum and minimum temperatures in Milwaukee during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Milwaukee during September?
Moderate rainfall is anticipated in Milwaukee during September, with a total of 69.6 mm spread over approximately 12 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Milwaukee during September?
The average wind speed in Milwaukee during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Milwaukee
Explore the daily rainfall trends and prepare for Milwaukees September weather 💧
Typically, Milwaukee has 12 rainy days in September with a total of 69.6 mm of rainfall.
UV exposure in Milwaukee during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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