Bon Homme County Climate
Bon Homme County, South Dakota
Avg Annual Temp
47.3°F
Annual Precip
26.2"
Annual Snowfall
36.6"
Extreme Heat Days
25.7
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Bon Homme County Weather
Mild Temperatures on the State Border
Bon Homme County averages 47.3°F annually, trailing the national median of 53°F but ranking high for its latitude. It is one of the state's wetter areas, receiving 26.2 inches of annual precipitation.
Consistently Above the State Average
At 1.7 degrees above the state average of 45.6°F, Bon Homme is among the warmest counties in South Dakota. Its proximity to the Missouri River helps influence these more moderate temperature readings.
Wetter Than the Central Prairies
With 26.2 inches of precipitation, the county is much wetter than neighbors like Buffalo County, which sees only 20.1 inches. It also receives 36.6 inches of snow, which is slightly below the state mean.
Warm Summers and Brisk Januarys
July brings an average of 74.4°F and 26 days of extreme heat over 90°F. January is brisk at 18.8°F, creating a wide seasonal range typical of the upper Midwest.
Managing Humidity and Summer Heat
Residents should invest in powerful AC units to handle the humid summers and 26 days of extreme heat. Standard winter maintenance is required for the 36.6 inches of annual snowfall.
Frequently Asked Questions
What is the average temperature in Bon Homme County?
How much rain does Bon Homme County get?
Does it snow in Bon Homme County?
How hot does Bon Homme County get in summer?
How cold are winters in Bon Homme County?
Track your own weather in Bon Homme County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
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.