Average September Temperatures for Michigan

Average temperatures for September at cities, towns and parks throughout Michigan are listed below in degrees Fahrenheit and Celsius.

You can jump to a separate table for each region of the state: The Thumb & Southeast Michigan, West & Mid-Michigan, Northern Michigan and Upper Peninsula.

The tables give the normals for maximum and minimum temperatures based on weather data collected from 1991 to 2020 by the US National Centers for Environmental Information.

The Thumb & Southeast Michigan

Average September temperatures
High °F	Low °F	Place	High °C	Low °C
76	51	Adrian	24	11
75	52	Ann Arbor	24	11
74	52	Bay City	23	11
75	53	Dearborn	24	12
74	56	Detroit	24	13
73	50	Flint	23	10
70	52	Harbor Beach	21	11
73	52	Midland	23	11
75	54	Monroe	24	12
74	51	Mount Pleasant	23	11
73	57	Port Huron	23	14
74	52	Saginaw	24	11

West & Mid-Michigan

Average daily temperatures in September
High °F	Low °F	Place	High °C	Low °C
74	51	Battle Creek	24	11
74	52	Benton Harbor	23	11
74	53	Grand Rapids	23	12
74	52	Holland	23	11
74	52	Jackson	23	11
74	53	Kalamazoo	23	11
74	52	Lansing	23	11
73	54	Muskegon	23	12
76	53	Niles	24	12

Northern Michigan

September temperatures: daily averages
High °F	Low °F	Place	High °C	Low °C
71	47	Alpena	22	8
70	48	Cadillac	21	9
70	50	Cheboygan	21	10
72	49	East Tawas	22	10
69	54	Frankfort	21	12
68	46	Gaylord	20	8
67	50	Harrisville	19	10
71	46	Houghton Lake	22	8
71	50	Ludington	21	10
69	51	Petoskey	21	11
68	52	St James, Beaver Island	20	11
72	52	Traverse City	22	11

Upper Peninsula

Average September temperatures
High °F	Low °F	Place	High °C	Low °C
69	43	Champion Van Riper Park	20	6
66	51	De Tour Village	19	11
68	49	Escanaba	20	9
68	50	Grand Marais	20	10
70	47	Iron Mountain	21	8
67	46	Ironwood	19	8
66	50	Manistique	19	10
67	52	Marquette	20	11
65	49	Munising	18	9
68	49	Sault Ste Marie	20	9
68	43	Tahquamenon Falls Park	20	6
67	51	Whitefish Point	19	10

Average Temperatures for Michigan in September

The Thumb & Southeast Michigan

West & Mid-Michigan

Northern Michigan

Upper Peninsula

Reference

More Michigan Weather Information