Roberts County Climate
Roberts County, South Dakota
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
43.2°F
Annual Precip
24.9"
Annual Snowfall
48.6"
Extreme Heat Days
10
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
4b
Minimum winter temperature range for plant survival
2,424
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Roberts County
Climate Verdict
Roberts County has a cool, averaging 43.2°F annually, semi-arid conditions with only 24.9 inches of annual precipitation, rare extreme heat with only 10.34 days above 90°F annually, moderate snowfall of 48.6 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 12.1°F. summers are warm — July averages 70.9°F. Residents experience a substantial 59°F difference between winter and summer.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
Roberts County closely matches the South Dakota statewide average temperature of 45.6°F, it is somewhat wetter than average for South Dakota.
Climate Profile
About Roberts County Weather
One of the Nation's Coldest Corners
Roberts County's annual average of 43.2°F is significantly lower than the national median. The county experiences long, rigorous winters typical of the northeastern plains.
A Cold and Snowy State Outlier
At 43.2°F, Roberts County is one of the colder counties in South Dakota, falling well below the 45.6°F state average. It also sees 48.6 inches of snow, much higher than the state median.
More Snow and Less Heat Than Neighbors
Roberts County records 48.6 inches of snow, nearly double the amount seen in Sanborn. It also stays cooler in the summer, with only 10 days hitting 90°F compared to the 26 days in Perkins.
Harsh Winters and Pleasant Summers
The winter average of 15.5°F makes for a long cold season, dominated by nearly 49 inches of snowfall. Summers are relatively mild, with July averaging 70.9°F and very few extreme heat events.
Focusing on High-Efficiency Winter Heating
With January averages of just 12.1°F, high-quality home heating and insulation are the top priorities. Residents should also prepare for significant snow clearance for the nearly 50 inches of annual accumulation.
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.