Buffalo County Climate
Buffalo County, South Dakota
Avg Annual Temp
46.3°F
Annual Precip
20.1"
Annual Snowfall
18.9"
Extreme Heat Days
28.95
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Buffalo County Weather
Dry and Temperate Plains Climate
Buffalo County's 46.3°F annual average is below the national median of 53°F. It is one of the drier counties in the state, receiving only 20.1 inches of precipitation annually.
Slightly Above the State Average
At 46.3°F, Buffalo County is marginally warmer than the South Dakota average of 45.6°F. Its dry climate often leads to more extreme temperature swings between day and night.
Low Snowfall Compared to Peers
Buffalo County only sees 18.9 inches of snow, which is less than half the 43.3 inches seen in neighboring Brule County. Its total precipitation of 20.1 inches is also lower than the state average.
Hot Summers and Very Dry Winters
The county deals with 29 days of extreme heat and a July average of 74.2°F. Winters are cold but dry, with January averaging 17.5°F and minimal snow accumulation.
Prepare for Dry Summer Heat
Effective cooling and hydration are essential for the 29 days of extreme summer heat. While snow removal is less of a burden here, residents still need reliable heating for the 17.5°F January average.
Frequently Asked Questions
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.