Average Precipitation for South Dakota in May





The tables below give monthly averages for rainfall plus snowfall during May at cities, towns and parks in South Dakota.

Each place has a total for the amount of precipitation it usually receives this month. Most sites also have information on the number of days with wet weather. That includes the days when precipitation amounts to 0.01 inches (0.25 millimetres) or more.

The precipitation totals are averages based on weather data collected from 1981 to 2010 for the NOAA National Climatic Data Center.

You can jump to a separate table for each region of the state: Eastern, Central and Western South Dakota.

Eastern South Dakota

Average monthly precipitation in May
Days Place Inches Milli­metres
10 Aberdeen 3.1 79
11 Brookings 3.0 75
11 Huron 3.1 79
Mitchell 3.4 87
12 Sioux Falls 3.4 86
10 Vermillion 3.9 100
11 Watertown 2.7 68
9 Waubay Wildlife Refuge 2.7 69
11 Yankton 3.7 95

Central South Dakota

May averages for total rainfall plus snowfall
Days Place Inches Milli­metres
11 Academy 3.6 92
10 Mobridge 2.7 69
11 Pickstown 3.6 91
10 Pierre 3.2 80

Western South Dakota

Average amount of rain and snow in May
Days Place Inches Milli­metres
13 Custer 3.6 91
12 Deadwood 5.0 128
10 Hot Springs 3.2 80
10 Interior 3.2 82
13 Lead 4.6 118
9 Lemmon 2.9 72
12 Mt. Rushmore National Memorial 4.2 107
13 Pactola Reservoir Dam 4.0 101
10 Porcupine 2.9 74
14 Rapid City 4.2 106
12 Spearfish 3.9 99
Wind Cave National Park 3.4 87
Reference

National Climatic Data Center. NOAA's 1981-2010 Climate Normals.

South Dakota Precipitation
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