Lake Michigan (MI)
September
Weather in Lake Michigan, Michigan for September 2026
Your guide to Lake Michigan weather in September - trends and predictions
So far, September 2026 in Lake Michigan is slightly warmer than the historical average by 1.1 °F.
The forecast for the next days in Lake Michigan predicts a temperature of 16.2 °F, which is cooler than the historical average.
In general, the average temperature in Lake Michigan at the beginning of September is 21.6 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 19 °F by the end of September.
The climate of Lake Michigan in September is notably wet, with an average of 11 rainy days, and a total of 154.7 mm of precipitation.
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Temperatures
Rain 🌧️
More
19
Dry days
11
Rainy days
0
Snow days
20°/15°
Temperatures
22 km/h
Avg max wind
77 %
Avg humidity
Lake Michigan Weather September
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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
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Overcast | 23° /16° | 0 mm | 5 | |
| Sept. 2 |  Sunny | 22° /15° | 3 mm | 3 | |
| Sept. 3 | Sunny | 22° /15° | 55.2 mm | 5 | |
| Sept. 4 | Sunny | 22° /14° | 92 mm | 4 | |
| Sept. 5 |  Moderate or heavy rain shower | 23° /16° | 10.7 mm | 4 | |
| Sept. 6 |  Patchy rain possible | 20° /13° | 0.9 mm | 5 | |
| Sept. 7 | Patchy rain possible | 19° /12° | 3.3 mm | 4 | |
| Sept. 8 |  Partly cloudy | 21° /13° | 2.2 mm | 4 | |
| Sept. 9 | Sunny | 22° /16° | 5 mm | 4 | |
| Sept. 10 | Overcast | 21° /14° | 0 mm | 5 | |
| Sept. 11 |  Cloudy | 22° /14° | 0 mm | 5 | |
| Sept. 12 | Sunny | 23° /15° | 0 mm | 5 | |
| Sept. 13 | Sunny | 23° /16° | 20.7 mm | 5 | |
| Sept. 14 | Sunny | 24° /15° | 0.1 mm | 6 | |
| Sept. 15 | Sunny | 24° /15° | 12.9 mm | 4 | |
| Sept. 16 | Sunny | 23° /16° | 0 mm | 4 | |
| Sept. 17 | Overcast | 21° /15° | 0.1 mm | 4 | |
| Sept. 18 | Partly cloudy | 21° /15° | 0.4 mm | 4 | |
| Sept. 19 | Overcast | 20° /14° | 0.8 mm | 4 | |
| Sept. 20 | Moderate rain at times | 21° /15° | 6.1 mm | 4 | |
| Sept. 21 | Overcast | 19° /14° | 23.2 mm | 3 | |
| Sept. 22 | Moderate or heavy rain shower | 20° /13° | 7.6 mm | 3 | |
| Sept. 23 | Partly cloudy | 20° /16° | 10.5 mm | 5 | |
| Sept. 24 | Sunny | 20° /11° | 0 mm | 5.1 | |
| Sept. 25 | Overcast | 19° /14° | 0 mm | 5.1 | |
| Sept. 26 | Sunny | 17° /13° | 0 mm | 5 | |
| Sept. 27 | Overcast | 17° /14° | 0 mm | 4.5 | |
| Sept. 28 | Sunny | 18° /14° | 0 mm | 5 | |
| Sept. 29 | Overcast | 21° /15° | 0 mm | 5 | |
| Sept. 30 | Light rain shower | 21° /8° | 17.2 mm | 4 | |
| 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.
Change Month
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 20° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Lake Michigan during September?
Significant rainfall exceeding 154.7 mm is expected in Lake Michigan during September, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Lake Michigan during September?
The average wind speed in Lake Michigan during September is 22 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 💧
Typically, Lake Michigan has 11 rainy days in September with a total of 154.7 mm of rainfall.
UV exposure in Lake Michigan during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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