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The temperatures in Detroit in September are comfortable with low of 15°C and and high up to 22°C.
You can expect about 3 to 8 days of rain in Detroit during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Detroit in September 2025.
If you’re planning to visit Detroit in the near future, we highly recommend that you review the 14 day weather forecast for Detroit before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -7° | 5 | 9 | 17 | 74 mm | Awful | Detroit in January |
| February | -1° / -6° | 5 | 8 | 16 | 76 mm | Awful | Detroit in February |
| March | 5° / -1° | 7 | 16 | 8 | 86 mm | Awful | Detroit in March |
| April | 11° / 4° | 10 | 17 | 3 | 161 mm | Awful | Detroit in April |
| May | 18° / 10° | 9 | 22 | 0 | 193 mm | Ok | Detroit in May |
| June | 23° / 16° | 9 | 21 | 0 | 209 mm | Good | Detroit in June |
| July | 26° / 19° | 9 | 22 | 0 | 178 mm | Good | Detroit in July |
| August | 26° / 19° | 7 | 24 | 0 | 162 mm | Good | Detroit in August |
| September | 22° / 15° | 7 | 23 | 0 | 122 mm | Ok | Detroit in September |
| October | 15° / 9° | 7 | 24 | 0 | 116 mm | Ok | Detroit in October |
| November | 8° / 3° | 6 | 19 | 5 | 78 mm | Bad | Detroit in November |
| December | 2° / -2° | 7 | 12 | 13 | 71 mm | Awful | Detroit in December |