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. Most locations 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 annual 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 yearly precipitation
Days Place Inches Milli­metres
94 Aberdeen 21.7 552
92 Brookings 24.3 617
93 Huron 22.9 582
Mitchell 25.9 658
105 Sioux Falls 26.4 670
75 Vermillion 27.6 702
94 Watertown 21.9 555
82 Waubay Wildlife Refuge 22.4 570
87 Yankton 27.1 688

Central South Dakota

Annual averages for rainfall plus snowfall
Days Place Inches Milli­metres
89 Academy 23.8 605
88 Mobridge 16.3 414
85 Pickstown 24.2 614
88 Pierre 19.9 506

Western South Dakota

Average amount of rain and snow a year
Days Place Inches Milli­metres
92 Custer 19.7 499
95 Deadwood 29.8 756
75 Hot Springs 17.7 449
80 Interior 18.5 470
129 Lead 30.5 774
73 Lemmon 17.9 454
92 Mt. Rushmore National Memorial 21.5 547
101 Pactola Reservoir Dam 20.3 516
73 Porcupine 18.5 471
100 Rapid City 19.8 503
89 Spearfish 21.9 556
Wind Cave National Park 19.7 499
Reference

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

South Dakota Precipitation
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