Milwaukee County (Milwaukee)
September
Weather in Milwaukee County, Wisconsin for September 2026
Your guide to Milwaukee County weather in September - trends and predictions
Until now, September 2026 in Milwaukee County is slightly cooler than the historical average by 0.9 °F.
The forecast for the next days in Milwaukee County predicts a temperature of 15.2 °F, which is cooler than the historical average.
In general, the average temperature in Milwaukee County at the beginning of September is 26.4 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.7 °F by the end of September.
The climate of Milwaukee County 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 County Weather September
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Temperatures trend during September in Milwaukee County
See the weather trend as well as the moving average line
September weather in Milwaukee County 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° | 1 mm | 6 | |
| Sept. 12 | Overcast | 24° /14° | 0.1 mm | 5 | |
| Sept. 13 | Light rain shower | 21° /14° | 6.4 mm | 5 | |
| Sept. 14 | Mist | 24° /13° | 0.1 mm | 6 | |
| Sept. 15 | Mist | 27° /15° | 5.4 mm | 6 | |
| Sept. 16 |  Patchy light drizzle | 26° /15° | 0.9 mm | 5 | |
| Sept. 17 | Mist | 24° /14° | 1 mm | 5 | |
| Sept. 18 | Cloudy | 22° /14° | 1.2 mm | 5 | |
| Sept. 19 |  Thundery outbreaks possible | 22° /15° | 14 mm | 4 | |
| Sept. 20 | Thundery outbreaks possible | 24° /16° | 8.3 mm | 5 | |
| Sept. 21 | Patchy rain possible | 23° /15° | 0.7 mm | 5 | |
| Sept. 22 |  Moderate or heavy rain shower | 22° /14° | 16.8 mm | 5 | |
| Sept. 23 | Fog | 21° /13° | 1.8 mm | 5 | |
| Sept. 24 | Overcast | 20° /14° | 0 mm | 5 | |
| Sept. 25 | Patchy rain possible | 20° /13° | 0.2 mm | 4 | |
| Sept. 26 | Fog | 22° /12° | 7.6 mm | 5 | |
| Sept. 27 | Fog | 22° /13° | 1.8 mm | 4 | |
| Sept. 28 | Patchy rain possible | 21° /14° | 0 mm | 5 | |
| Sept. 29 | Overcast | 21° /14° | 0 mm | 5.1 | |
| Sept. 30 | Patchy rain possible | 19° /13° | 19.7 mm | 0.6 | |
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Important Notice
Our weather forecast for Milwaukee County 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 County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Milwaukee County in September - FAQ
What are the expected maximum and minimum temperatures in Milwaukee County 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 County during September?
Moderate rainfall is anticipated in Milwaukee County 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 County during September?
The average wind speed in Milwaukee County during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Milwaukee County
Explore the daily rainfall trends and prepare for Milwaukee Countys September weather 💧
Typically, Milwaukee County has 12 rainy days in September with a total of 69.6 mm of rainfall.
UV exposure in Milwaukee County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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