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Weather in Lake Michigan, Michigan for September 2025

Your guide to Lake Michigan weather in September - trends and predictions

    Temperatures

  • The forecast for the first days of September 2025 in Lake Michigan predicts temperatures to be around 21 °F, close to the historical average.

  • In general, the average temperature in Lake Michigan at the beginning of September is 21.1 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 20.1 °F by the end of September.

    • Rain 🌧️

  • Lake Michigan experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 47.6 mm.

    • More

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

Average dry days
23
Dry days
Average rainy days
7
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/15°
Temperatures
Average wind speed
21 km/h
Avg max wind
Average humidity
71 %
Avg humidity

Lake Michigan Weather September

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

Temperatures trend during September in Lake Michigan

See the weather trend as well as the moving average line

September weather in Lake Michigan day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Moderate rain
Moderate rain
 25° /16° 11 mm 4
Sept. 2 Patchy rain possible
Patchy rain possible
 21° /17° 0.5 mm 4
Sept. 3 Patchy rain possible
Patchy rain possible
 23° /16° 2.4 mm 4
Sept. 4 Patchy rain possible
Patchy rain possible
 20° /18° 0.4 mm 4
Sept. 5 Sunny
Sunny
 21° /17° 0 mm 5
Sept. 6 Sunny
Sunny
 19° /15° 0 mm 5
Sept. 7 Sunny
Sunny
 19° /14° 0 mm 5
Sept. 8 Partly cloudy
Partly cloudy
 20° /12° 0 mm 6
Sept. 9 Sunny
Sunny
 21° /15° 0 mm 6
Sept. 10 Sunny
Sunny
 22° /14° 0 mm 6
Sept. 11 Cloudy
Cloudy
 23° /17° 0 mm 5
Sept. 12 Sunny
Sunny
 25° /17° 0 mm 7
Sept. 13 Sunny
Sunny
 28° /17° 0 mm 7
Sept. 14 Sunny
Sunny
 26° /17° 0 mm 7
Sept. 15 Sunny
Sunny
 24° /18° 0 mm 6
Sept. 16 Sunny
Sunny
 24° /17° 0 mm 6
Sept. 17 Overcast
Overcast
 24° /16° 0 mm 5
Sept. 18 Partly cloudy
Partly cloudy
 22° /15° 0 mm 6
Sept. 19 Overcast
Overcast
 22° /15° 0 mm 5
Sept. 20 Moderate rain at times
Moderate rain at times
 22° /19° 2 mm 5
Sept. 21 Overcast
Overcast
 21° /17° 0 mm 5
Sept. 22 Moderate or heavy rain shower
Moderate or heavy rain shower
 21° /16° 7.5 mm 5
Sept. 23 Partly cloudy
Partly cloudy
 19° /14° 0 mm 5
Sept. 24 Moderate or heavy rain shower
Moderate or heavy rain shower
 19° /12° 19.7 mm 4
Sept. 25 Patchy rain possible
Patchy rain possible
 20° /16° 2.6 mm 5
Sept. 26 Overcast
Overcast
 19° /14° 0 mm 4
Sept. 27 Sunny
Sunny
 22° /14° 0 mm 6
Sept. 28 Sunny
Sunny
 21° /14° 0 mm 6
Sept. 29 Partly cloudy
Partly cloudy
 20° /13° 0 mm 6
Sept. 30 Overcast
Overcast
 20° /15° 0 mm 5
Next
Important Notice
Our weather forecast for Lake Michigan 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 Lake Michigan forecast closer to your planned date for the most up-to-date weather information.
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Lake Michigan in September - FAQ

What are the expected maximum and minimum temperatures in Lake Michigan during September?
During September, expect a variety of temperatures with highs around 22° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Lake Michigan during September?
In September, Lake Michigan can expect light to moderate rainfall, totaling 47.6 mm across approximately 7 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Lake Michigan during September?
The average wind speed in Lake Michigan during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Lake Michigan

Explore the daily rainfall trends and prepare for Lake Michigans September weather 💧

UV exposure in Lake Michigan during September

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

Quick links

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Location coordinates Where is Lake Michigan?

Get accurate weather forecasts for Lake Michigan, located at latitude 44.008 and longitude -86.757. Stay updated with localized weather information tailored for Lake Michigan.

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