Average Rainfall for Michigan in September
The tables below give monthly averages for rainfall during September at cities, communities and other locations around Michigan.
Each place has a total for the amount of precipitation it usually receives this month. There is also a count of the number of days with wet weather, when precipitation amounts to 0.01 inches (0.25 millimetres) or more.
The rainfall totals are averages based on weather data collected from 1991 to 2020 for the US National Centers for Environmental Information.
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 Thumb & Southeast Michigan
| Days | Place | Inches | Millimetres |
|---|---|---|---|
| 9 | Adrian | 3.3 | 84 |
| 11 | Ann Arbor | 3.2 | 81 |
| 8 | Bay City | 3.2 | 82 |
| 9 | Dearborn | 3.0 | 76 |
| 10 | Detroit | 3.2 | 82 |
| 10 | Flint | 2.9 | 74 |
| 10 | Harbor Beach | 3.2 | 81 |
| 10 | Midland | 2.8 | 72 |
| 10 | Port Huron | 3.3 | 84 |
| 9 | Saginaw | 2.7 | 68 |
West & Mid-Michigan
| Days | Place | Inches | Millimetres |
|---|---|---|---|
| 10 | Battle Creek | 3.1 | 78 |
| 12 | Benton Harbor | 3.6 | 92 |
| 10 | Grand Rapids | 3.4 | 87 |
| 11 | Holland | 3.0 | 75 |
| 10 | Jackson | 3.0 | 76 |
| 10 | Lansing | 2.8 | 71 |
| 9 | Muskegon | 3.3 | 83 |
| 10 | Niles | 3.5 | 89 |
Northern Michigan
| Days | Place | Inches | Millimetres |
|---|---|---|---|
| 11 | Alpena | 2.8 | 72 |
| 12 | Cadillac | 3.2 | 80 |
| 13 | Cheboygan | 3.4 | 85 |
| 10 | East Tawas | 2.9 | 74 |
| 11 | Frankfort | 3.8 | 95 |
| 11 | Gaylord | 3.7 | 95 |
| 11 | Harrisville | 2.8 | 71 |
| 10 | Houghton Lake | 2.7 | 69 |
| 12 | Petoskey | 3.6 | 90 |
| 13 | Traverse City | 3.4 | 86 |
Upper Peninsula
| Days | Place | Inches | Millimetres |
|---|---|---|---|
| 11 | De Tour Village | 3.6 | 92 |
| 11 | Escanaba | 3.2 | 82 |
| 12 | Iron Mountain | 2.9 | 75 |
| 14 | Ironwood | 3.8 | 98 |
| 13 | Marquette | 3.3 | 85 |
| 14 | Munising | 4.2 | 108 |
| 13 | Sault Ste Marie | 3.9 | 100 |
| 15 | Whitefish Point | 3.8 | 96 |
Reference
NOAA National Centers for Environmental Information (NCEI). Climate Normals.