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Detroit weather in September 2026
Expect daytime maximum temperatures of 73°F in Detroit, Michigan in September based on long-term weather averages. There are 7 hours of sunshine per day on average with 10 days with some rainfall and typically 2.9 inches of rainfall in the month.
- 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.
Metric (°C) | Imperial (°F)
More about the USA
How hot is it in Detroit in September?
Daytime temperatures usually reach 73°F in Detroit in September, falling to 55°F at night.
How sunny is it in Detroit in September?
There are normally 7 hours of bright sunshine each day in Detroit in September - that's 54% of daylight hours.
How warm is the sea around Detroit in September?
The average sea temperature around Detroit in September is 68°F.
Does it rain in Detroit in September?
There are usually 10 days with some rain in Detroit in September and the average monthly rainfall is 2.9 inches.
Detroit September sunrise & sunset times
Browse the sunrise and sunset times for Detroit in September 2026. Select a month to view Detroit sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Tuesday, 1st September 2026 | 05:58 | 19:06 |
| Tuesday, 15th September 2026 | 06:12 | 18:42 |
| Wednesday, 30th September 2026 | 06:28 | 18:15 |
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