Average Rainfall for Minnesota in August





The tables below give monthly averages for rainfall during August 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

Average monthly precipitation in August
Days Place Inches Milli­metres
10 Albert Lea 4.3 108
10 Faribault 4.7 118
9 Mankato 4.3 109
10 Minneapolis 4.3 110
10 Pipestone 3.5 88
9 Redwood Falls 4.0 102
10 Rochester 4.1 105
11 St. Paul 4.5 115
9 Winona 4.6 116
10 Worthington 3.9 98

Northeastern Minnesota

August averages for total rainfall
Days Place Inches Milli­metres
11 Duluth 3.7 95
9 Grand Marais 2.6 65
10 Grand Portage 3.0 77
10 Grand Rapids 3.4 86
11 Gunflint Lake 2.8 71
11 Hibbing 3.1 78
11 International Falls 2.8 72
11 Two Harbors 3.5 88
10 Wild River State Park 4.0 102

Northwestern Minnesota

Average amount of rain in August
Days Place Inches Milli­metres
10 Agassiz Wildlife Refuge 3.3 83
10 Alexandria 3.5 88
10 Brainerd 3.6 91
9 Detroit Lakes 3.3 83
6 Fergus Falls 3.0 75
9 Mille Lacs Lake 3.9 98
9 Moorhead 2.7 70
9 St. Cloud 4.0 102
10 Warroad 4.3 109
Reference

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

Minnesota Precipitation
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