Hyde County Climate
Hyde County, South Dakota
Avg Annual Temp
44.8°F
Annual Precip
21.6"
Annual Snowfall
38.3"
Extreme Heat Days
24.933333333333337
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Hyde County Weather
Cool Continental Breezes on the Prairie
Hyde County's average annual temperature of 44.8°F is significantly cooler than the national median of 55°F. The local climate is defined by its wide temperature swings and semi-arid tendencies. This region experiences the full force of northern interior weather patterns.
Mirroring the South Dakota State Average
At 44.8°F, Hyde County sits just below the South Dakota state average of 45.6°F. Its annual precipitation of 21.6 inches is slightly lower than the state benchmark of 22.7 inches. This makes it a representative example of the state's central plains environment.
Drier and Cooler Than Eastern Neighbors
Hyde County is generally drier than counties to the east, receiving 21.6 inches of rain compared to higher totals in the Missouri River valley. Its winter average of 18.6°F is notably colder than the more temperate southern counties. July remains warm with an average of 72.3°F, consistent with central South Dakota norms.
Harsh Winters and Hot Summer Peaks
Winter is rigorous here, with January temperatures averaging just 15.6°F and 38.3 inches of annual snow. Conversely, summer brings 25 days of extreme heat reaching 90°F or higher. This creates a high-contrast environment where temperatures fluctuate drastically between July and January.
Winter Reliability and Summer Cooling
Heavy-duty winter gear and vehicle winterization are critical for the 15.6°F January cold. Residents should plan for 25 days of extreme heat by ensuring air conditioning units are serviced by June. Water conservation techniques are helpful given the county's lower-than-average 21.6 inches of rainfall.
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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.