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Michigan weather in September 2025
Expect 73°F 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.
- 73°F max day temperature
73 - 7 hours of sunshine per day
- 10 days with some rainfall
10 - 55°F min night temperature
55 - 12 hours of daylight per day
12 - No heat & humidity
0 - 2.9 inches of monthly rainfall
2.9 - 6 (High) UV index
6 - 68°F sea temperature
68
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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) | Imperial (°F)
More about the USA
How hot is it in Michigan in September?
Daytime temperatures usually reach 73°F in Detroit, Michigan in September, falling to 55°F 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 68°F.
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 2.9 inches.
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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