Miner County Climate
Miner County, South Dakota
Avg Annual Temp
46.6°F
Annual Precip
26.4"
Annual Snowfall
35.8"
Extreme Heat Days
14
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Miner County Weather
Classic Continental Climate of the Plains
Miner County maintains an annual average temperature of 46.6°F, which is cool compared to the national average. It receives a healthy 26.4 inches of precipitation, making it more moisture-rich than the western US. The climate is defined by cold winters and warm, humid summers.
Warmer and Wetter Than the State
Miner County's average temperature of 46.6°F is exactly one degree warmer than the South Dakota average of 45.6°F. It also receives nearly four inches more precipitation than the state average of 22.7 inches. This combination makes it a relatively mild and damp part of the state.
Consistent Precipitation and Moderate Heat
Miner County sees 14 days of extreme heat, which is fewer than its neighbors to the west. Its 35.8 inches of annual snowfall is typical for the region, keeping winters consistently cold. The county's 26.4 inches of rain ensures it avoids the drought-prone conditions of the western plains.
Predictable Snowfall and Temperate Summers
July averages 73.7°F, while January brings a cold average of 16.8°F. The county experiences 35.8 inches of snow spread across a long winter season that averages 20.0°F. Summers are generally pleasant, as extreme heat over 90°F only occurs about 14 days a year.
Managing Moisture and Winter Chill
With 26.4 inches of precipitation, residents should ensure proper basement waterproofing and drainage. Standard winter clothing and snow tires are necessary for the 35.8 inches of annual snow. Energy costs are balanced by the relatively low number of extreme heat days compared to central South Dakota.
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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.