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. 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 precipitation 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: Eastern, Central and Western South Dakota.

Eastern South Dakota

Average monthly precipitation in May
Days Place Inches Milli­metres
10 Aberdeen 3.3 83
13 Brookings 3.5 88
11 Huron 3.2 80
12 Mitchell 3.7 94
12 Sioux Falls 3.9 98
10 Vermillion 4.0 101
11 Watertown 2.9 73
10 Waubay Wildlife Refuge 2.9 74
12 Yankton 3.7 93

Central South Dakota

May averages for total rainfall plus snowfall
Days Place Inches Milli­metres
11 Academy 3.5 90
10 Mobridge 3.1 78
11 Pickstown 4.0 102
11 Pierre 3.3 83

Western South Dakota

Average amount of rain and snow in May
Days Place Inches Milli­metres
14 Custer 3.5 90
11 Hot Springs 3.3 83
10 Interior 3.6 92
14 Lead 4.9 124
9 Lemmon 2.8 72
14 Mt. Rushmore National Memorial 4.8 122
13 Pactola Reservoir Dam 4.3 108
10 Porcupine 3.2 81
13 Rapid City 3.5 88
12 Spearfish 3.7 94
11 Wind Cave National Park 3.7 95
Reference

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

South Dakota Precipitation
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