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Michigan weather in September 2025
Expect 23°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Michigan in September. Check more long-term weather averages for Michigan in September before you book your next holiday to Michigan in 2025/2026.
- 23°C max day temperature
23 - 7 hours of sunshine per day
- 10 days with some rainfall
10 - 13°C min night temperature
13 - 12 hours of daylight per day
12 - No heat & humidity
0 - 73 mm of monthly rainfall
73 - 6 (High) UV index
6 - 20°C sea temperature
20
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Recommended for Michigan
The September weather guide for Michigan (Detroit) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Top Michigan destinations
Below are average maximum temperatures at popular countries, regions and places in Michigan in September. Select a holiday destination to see more weather parameters.
All Michigan destinations
- Alpena
- Detroit
- Escanaba
- Grand Marais
- Holland
- Iron Mountain
- Isle Royale
- Lansing
- Ludington
- Mackinac Island
- Muskegon
- Saginaw
- Sault Ste. Marie
- Traverse City
Metric (°C / mm) | Imperial (°F / inches)
More about the USA
How hot is it in Michigan in September?
Daytime temperatures usually reach 23°C in Detroit, Michigan in September, falling to 13°C at night.
How sunny is it in Michigan in September?
There are normally 7 hours of bright sunshine each day in Detroit, Michigan in September - that's 54% of daylight hours.
How warm is the sea around Michigan in September?
The average sea temperature around Detroit, Michigan in September is 20°C.
Does it rain in Michigan in September?
There are usually 10 days with some rain in Detroit, Michigan in September and the average monthly rainfall is 73mm.
Michigan September sunrise & sunset times
Browse the sunrise and sunset times for Michigan in September 2025. Select a month to view Michigan sunrise and sunset times for the next 12 months. The Michigan sunrise and sunset times shown below are for Detroit.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Monday, 1st September 2025 | 05:58 | 19:06 |
| Monday, 15th September 2025 | 06:12 | 18:41 |
| Tuesday, 30th September 2025 | 06:29 | 18:15 |
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