Average Annual Precipitation for South Dakota





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

Each place has a total for the amount of precipitation it usually receives in a year. 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 annual 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 yearly precipitation
Days Place Inches Milli­metres
98 Aberdeen 21.8 554
99 Brookings 25.2 640
95 Huron 23.3 592
89 Mitchell 25.8 655
104 Sioux Falls 27.9 707
77 Vermillion 28.0 711
96 Watertown 22.7 577
81 Waubay Wildlife Refuge 22.5 572
88 Yankton 28.7 728

Central South Dakota

Annual averages for rainfall plus snowfall
Days Place Inches Milli­metres
91 Academy 24.0 609
85 Mobridge 17.3 438
84 Pickstown 24.4 619
90 Pierre 20.2 513

Western South Dakota

Average amount of rain and snow a year
Days Place Inches Milli­metres
94 Custer 20.7 525
78 Hot Springs 18.6 473
80 Interior 19.6 498
133 Lead 31.8 807
73 Lemmon 18.0 457
102 Mt. Rushmore National Memorial 24.1 613
103 Pactola Reservoir Dam 21.5 547
79 Porcupine 19.9 505
96 Rapid City 17.4 443
93 Spearfish 21.4 544
88 Wind Cave National Park 21.2 538
Reference

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

South Dakota Precipitation
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