South Dakota Annual Rainfall and Climate Data, see below for individual cities
South Dakota city precipitation totals
Avg Annual Precip
Avg Annual Snow
|Avg # days of Precip||
Avg # thunderstorm days
|Avg # hail days||Avg # severe thunderstorm watches per year||Avg # tornado watches per year||# of tornadoes reported in county, 1960-2010|
South Dakota Precipitation Records
- Driest location ranked by lowest annual average precipitation: Belle Fourche (22mi NNW), western South Dakota,13.88"
- Wettest location ranked by highest annual average precipitation: Lead, western South Dakota, 29.85"
- Snowiest location ranked by highest annual average snowfall: Lead, western South Dakota, 193.0"
- State precipitation record for 24 hours - Nemo, western South Dakota, 6/9/1972, 15.00"
- State precipitation record for 1 year - Deadwood, western South Dakota, 1948, 48.42"
- State snowfall record for 24 hours - Deadwood, western South Dakota, 11/5-6/2008, 43.6"
- State snow record for 1 season - Lead, western South Dakota, 1996-1997, 424.0"
- In dry seasons, and particularly in western South Dakota in late summer, thunderstorm bases may be as high as two miles above the
ground and consequently the rain often evaporates before reaching the ground
- The wettest year statewide was 1915, when South Dakota averaged 28.52 inches
- Ludlow, South Dakota received only 2.89 inches of precipitation for the entire year of 1936
- On July 25, 1986, tremendous hailstones pounded parts of South Dakota damaging crops, buildings and vehicles. Hail piled two
feet deep at Black Hawk and northern Rapid City. Hail 1.25 inches in diameter fell for 85 minutes near Miller and Huron,
piling up to depths of two feet
Data sources: National Climatic Data Center, Severe thunderstorm / tornado watch data period is 1999 - 2008, NOAA Storm Prediction Center, Tornado climate data - NOAA Storm Prediction Center, State lightning flash density average - 1997-2011, Vaisala