Sanborn County Climate
Sanborn County, South Dakota
Avg Annual Temp
45.5°F
Annual Precip
24.6"
Annual Snowfall
26.3"
Extreme Heat Days
25.6
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Sanborn County Weather
Temperate Plains with Seasonal Swings
Sanborn County maintains an average temperature of 45.5°F, roughly 9 degrees below the national median. This climate provides four distinct seasons with significant variations in temperature.
The Model for South Dakota Climate
The county's 45.5°F annual average is almost identical to the South Dakota state average of 45.6°F. Its 24.6 inches of precipitation is also very close to the state's 22.7-inch average.
Lower Snowfall Than Northern Neighbors
Sanborn only receives 26.3 inches of snow, which is about 22 inches less than Roberts County. However, it experiences 26 extreme heat days, which is much higher than most eastern counties.
Hot Summers and Moderate Snowfall
Summers are quite warm, with 26 days reaching over 90°F and a July average of 72.7°F. Winter is cold but manageable, with 26.3 inches of snow and a January average of 15.5°F.
Preparing for Nearly a Month of Heat
With 26 days of extreme heat, ensuring your air conditioning is serviced by June is a smart move. Winter requires less heavy equipment than other counties, but reliable heating is still a must for the 15.5°F January lows.
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.