Average Rainfall for Minnesota in September
The tables below give monthly averages for rainfall during September at cities and other locations in Minnesota.
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: Southern, Northeastern and Northwestern Minnesota.
Southern Minnesota
| Days | Place | Inches | Millimetres |
|---|---|---|---|
| 9 | Albert Lea | 3.7 | 94 |
| 8 | Faribault | 3.7 | 93 |
| 8 | Mankato | 3.3 | 84 |
| 9 | Minneapolis | 3.0 | 77 |
| 9 | Pipestone | 3.3 | 83 |
| 8 | Redwood Falls | 2.9 | 72 |
| 9 | Rochester | 3.6 | 91 |
| 11 | St. Paul | 3.3 | 84 |
| 10 | Winona | 3.6 | 91 |
| 9 | Worthington | 3.2 | 82 |
Northeastern Minnesota
| Days | Place | Inches | Millimetres |
|---|---|---|---|
| 12 | Duluth | 3.5 | 88 |
| 10 | Grand Marais | 2.8 | 72 |
| 12 | Grand Portage | 3.1 | 80 |
| 11 | Grand Rapids | 3.1 | 77 |
| 11 | Gunflint Lake | 3.5 | 89 |
| 12 | Hibbing | 3.1 | 78 |
| 12 | International Falls | 3.0 | 76 |
| 12 | Two Harbors | 3.5 | 90 |
| 10 | Wild River State Park | 3.5 | 88 |
Northwestern Minnesota
| Days | Place | Inches | Millimetres |
|---|---|---|---|
| 10 | Agassiz Wildlife Refuge | 2.7 | 69 |
| 9 | Alexandria | 2.6 | 67 |
| 10 | Brainerd | 3.0 | 76 |
| 10 | Detroit Lakes | 3.6 | 90 |
| 6 | Fergus Falls | 3.0 | 77 |
| 8 | Mille Lacs Lake | 3.0 | 75 |
| 9 | Moorhead | 2.9 | 75 |
| 10 | St. Cloud | 3.0 | 76 |
| 11 | Warroad | 3.0 | 76 |
Reference
NOAA National Centers for Environmental Information (NCEI). Climate Normals.