Sanborn County Climate
Sanborn County, South Dakota
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
45.5°F
Annual Precip
24.6"
Annual Snowfall
26.3"
Extreme Heat Days
26
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
2,689
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Sanborn County
Climate Verdict
Sanborn County has a cool, averaging 45.5°F annually, semi-arid conditions with only 24.6 inches of annual precipitation, occasional hot days — 25.6 per year above 90°F, moderate snowfall of 26.3 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 15.5°F. summers are warm — July averages 72.7°F. Residents experience a substantial 57°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Sanborn County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Sanborn County closely matches the South Dakota statewide average temperature of 45.6°F.
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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Track your own weather in Sanborn County
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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.