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United States weather

Weather in Milwaukee, Wisconsin for September 2025

Your guide to Milwaukee weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Dense Fog Advisory - See hour by hour.

    • Temperatures

  • Until now, September 2025 in Milwaukee is cooler than usual, with temperatures averaging 20.3 °F, this is -4.2 °F below the typical seasonal average.

  • 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 25.1 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 22.4 °F by the end of September.

    • Rain 🌧️

  • Milwaukee experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 45.1 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
21
Dry days
Average rainy days
9
Rainy days
Average snowy days
0
Snow days
Average temperatures
24°/14°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
69 %
Avg humidity

Milwaukee Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Mist
25°
2
Partly cloudy
27°
3
Cloudy
27°
4
Overcast
27°
5
Overcast
28°
6
Light rain shower
23°
7
Overcast
19°
8
Cloudy
21°
9
Mist
24°
10
Mist
26°
11
Light rain
24°
12
Overcast
23°
13
Light rain shower
22°
14
Weather Alert Partly cloudy
24°
15
Partly cloudy
25°
16
Partly cloudy
24°
17
Partly cloudy
24°
18
Partly cloudy
24°
19
Patchy rain possible
23°
20
Moderate rain
21°
21
Patchy rain possible
19°
22
Sunny
18°
23
Sunny
20°
24
Sunny
20°
25
Sunny
23°
26
Sunny
24°
27
Sunny
24°
28
Patchy rain possible
20°
29
Fog
21°
30
Overcast
25°

Temperatures trend during September in Milwaukee

See the weather trend as well as the moving average line

September weather in Milwaukee day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Mist
Mist
 25° /12° 0 mm 6
Sept. 2 Partly cloudy
Partly cloudy
 27° /13° 0 mm 7
Sept. 3 Cloudy
Cloudy
 27° /14° 6.8 mm 6
Sept. 4 Overcast
Overcast
 27° /13° 0 mm 6
Sept. 5 Overcast
Overcast
 28° /16° 1.3 mm 6
Sept. 6 Light rain shower
Light rain shower
 23° /11° 1.6 mm 5
Sept. 7 Overcast
Overcast
 19° /8° 0.5 mm 5
Sept. 8 Cloudy
Cloudy
 21° /7° 0 mm 5
Sept. 9 Mist
Mist
 24° /12° 0 mm 6
Sept. 10 Mist
Mist
 26° /12° 0 mm 6
Sept. 11 Light rain
Light rain
 24° /15° 1.4 mm 6
Sept. 12 Overcast
Overcast
 23° /13° 0 mm 5
Sept. 13 Light rain shower
Light rain shower
 22° /14° 8.3 mm 5
Sept. 14 Partly cloudy
Partly cloudy
 24° /17° 0 mm 1.4
Sept. 15 Partly cloudy
Partly cloudy
 25° /17° 0 mm 1.4
Sept. 16 Partly cloudy
Partly cloudy
 24° /15° 0 mm 1.3
Sept. 17 Partly cloudy
Partly cloudy
 24° /16° 0 mm 1.3
Sept. 18 Partly cloudy
Partly cloudy
 24° /18° 0 mm 0
Sept. 19 Patchy rain possible
Patchy rain possible
 23° /18° 3.7 mm 4
Sept. 20 Moderate rain
Moderate rain
 21° /17° 8.2 mm 4
Sept. 21 Patchy rain possible
Patchy rain possible
 19° /16° 2.6 mm 4
Sept. 22 Sunny
Sunny
 18° /14° 0 mm 5
Sept. 23 Sunny
Sunny
 20° /14° 0 mm 5
Sept. 24 Sunny
Sunny
 20° /14° 0 mm 5
Sept. 25 Sunny
Sunny
 23° /14° 0 mm 5
Sept. 26 Sunny
Sunny
 24° /16° 0 mm 5
Sept. 27 Sunny
Sunny
 24° /17° 0 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
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.
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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?
In September, Milwaukee can expect light to moderate rainfall, totaling 45.1 mm across approximately 9 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Milwaukee during September?
The average wind speed in Milwaukee during September is 17 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 💧

UV exposure in Milwaukee during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Milwaukee?

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

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