Corson County Climate
Corson County, South Dakota
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
44.1°F
Annual Precip
18.8"
Annual Snowfall
39.6"
Extreme Heat Days
25
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
4b
Minimum winter temperature range for plant survival
2,464
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Corson County
Climate Verdict
Corson County has a cool, averaging 44.1°F annually, semi-arid conditions with only 18.8 inches of annual precipitation, occasional hot days — 25.4 per year above 90°F, moderate snowfall of 39.6 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 15.2°F. summers are warm — July averages 72.0°F. Residents experience a substantial 57°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Corson County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Corson County closely matches the South Dakota statewide average temperature of 45.6°F, it is somewhat drier than average for South Dakota.
Climate Profile
About Corson County Weather
Dry and Chilly Northern Plains
Corson County averages 44.1°F annually, reflecting the cold, dry environment of the northern Great Plains. This temperature is significantly lower than the national median of approximately 53°F.
Cooler and Drier Than the State
Corson falls below the South Dakota average in both temperature and moisture. It averages 44.1°F and 18.8 inches of precipitation, while the state averages 45.6°F and 22.7 inches.
Consistent with Regional Averages
Corson’s 44.1°F average temperature is nearly identical to neighboring Campbell County’s 44.3°F. It experiences slightly more extreme heat days than Campbell, averaging 25 days above 90°F.
Harsh Winters and Hot Peaks
The county sees a dramatic seasonal range, from a 15.2°F average in January to 72.0°F in July. Winter brings 39.6 inches of snow, making for a long and difficult cold season.
Prioritize Winter Safety and Insulation
Residents must prepare for 39.6 inches of snow and cold winter averages of 17.9°F. Emergency kits for vehicles are essential during the long, snowy winters in this rural area.
Frequently Asked Questions
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Data sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.