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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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Average dry days
22
Dry days
Average rainy days
8
Rainy days
Average snowy days
0
Snow days
Average temperatures
25°/14°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
70 %
Avg humidity

Wisconsin in September average weather

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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
Mist
26° /13° 0 mm 7
Sept. 2 Partly cloudy
Partly cloudy
29° /14° 0 mm 8
Sept. 3 Cloudy
Cloudy
31° /15° 0 mm 7
Sept. 4 Overcast
Overcast
32° /16° 0 mm 8
Sept. 5 Overcast
Overcast
32° /19° 2 mm 8
Sept. 6 Light rain shower
Light rain shower
26° /14° 2.4 mm 6
Sept. 7 Overcast
Overcast
18° /9° 0.8 mm 5
Sept. 8 Cloudy
Cloudy
21° /8° 0 mm 6
Sept. 9 Mist
Mist
24° /12° 0 mm 6
Sept. 10 Mist
Mist
27° /11° 0 mm 7
Sept. 11 Light rain
Light rain
25° /14° 2.1 mm 6
Sept. 12 Overcast
Overcast
24° /13° 0 mm 6
Sept. 13 Light rain shower
Light rain shower
21° /14° 3.9 mm 5
Sept. 14 Mist
Mist
23° /13° 0 mm 6
Sept. 15 Mist
Mist
28° /13° 0 mm 7
Sept. 16 Patchy light drizzle
Patchy light drizzle
28° /16° 1.8 mm 7
Sept. 17 Light rain shower
Light rain shower
23° /14° 1.8 mm 6
Sept. 18 Cloudy
Cloudy
22° /11° 0 mm 5
Sept. 19 Thundery outbreaks possible
Thundery outbreaks possible
23° /14° 0 mm 5
Sept. 20 Thundery outbreaks possible
Thundery outbreaks possible
27° /15° 0.1 mm 6
Sept. 21 Patchy rain possible
Patchy rain possible
28° /15° 0 mm 7
Sept. 22 Mist
Mist
24° /16° 11.4 mm 6
Sept. 23 Fog
Fog
22° /12° 0 mm 5
Sept. 24 Overcast
Overcast
21° /13° 0 mm 5
Sept. 25 Patchy rain possible
Patchy rain possible
22° /13° 0.1 mm 5
Sept. 26 Light rain shower
Light rain shower
22° /14° 15.1 mm 5
Sept. 27 Light rain shower
Light rain shower
20° /14° 3.6 mm 5
Sept. 28 Patchy rain possible
Patchy rain possible
20° /15° 0 mm 5
Sept. 29 Fog
Fog
21° /14° 0 mm 5
Sept. 30 Overcast
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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Location coordinates Where is Wisconsin?

Get accurate weather forecasts for Wisconsin, located at latitude 43.039 and longitude -87.906. Stay updated with localized weather information tailored for Wisconsin.

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