Jackson County Climate
Jackson County, South Dakota
Avg Annual Temp
48.5°F
Annual Precip
19.3"
Annual Snowfall
38.1"
Extreme Heat Days
46.46666666666666
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Jackson County Weather
Hot Summers in the Badlands Region
Jackson County maintains an annual average temperature of 48.5°F, which is lower than the national median but high for the Northern Plains. The area is characterized by a semi-arid climate with intense summer peaks. It experiences more extreme heat than many other parts of the American Midwest.
One of South Dakota's Warmest Spots
With an annual average of 48.5°F, Jackson County is nearly three degrees warmer than the South Dakota state average. However, it is also drier than average, receiving only 19.3 inches of precipitation annually. This combination creates a rugged, high-heat environment during the summer months.
Higher Heat Than Neighboring Western Counties
Jackson County stands out with 46 extreme heat days per year, far exceeding the state average. Its winter temperatures are also milder than northern neighbors, with a December-February average of 25.6°F. Despite the heat, it still receives 38.1 inches of snow, similar to the regional average.
A Climate of Intense Sun and Snow
Summer is the dominant season, featuring 46 days above 90°F and a July average of 75.0°F. Winters are surprisingly temperate for the region, with a January average of 24.0°F. Still, the county manages to accumulate 38.1 inches of snow throughout the colder months.
Maximum Cooling and Sun Protection
Residents must prioritize robust cooling systems to handle 46 days of extreme heat. Outdoor workers should plan for intense sun exposure during the 75.0°F July peak. While winters are milder at 24.0°F, snow removal tools are still required for the 38.1 inches of annual snowfall.
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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.