Calhoun County Climate
Calhoun County, Iowa
Avg Annual Temp
47.2°F
Annual Precip
33.8"
Annual Snowfall
32.1"
Extreme Heat Days
12.5
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Calhoun County Weather
Standard Midwestern Climate Trends
Calhoun County averages 47.2°F annually, which is about 6 degrees cooler than the national median. This keeps the region firmly within the humid continental climate zone.
Close to the State Average
At 47.2°F, the county is just 0.8 degrees shy of the Iowa state average of 48.0°F. It is also slightly drier than the rest of the state, receiving 33.8 inches of annual precipitation.
Drier than the Eastern Counties
Calhoun's precipitation of 33.8 inches is notably lower than Bremer or Buchanan to the east. It averages 32.1 inches of snowfall, which is consistent with its neighbors in north-central Iowa.
Steadily Increasing Summer Heat
Summer temperatures average 71.0°F, and the county sees 13 days of heat exceeding 90°F. Winters are cold but slightly milder than the northernmost counties, with a January average of 17.4°F.
Prepare for Moderate Snowfall
Homeowners should plan for 32.1 inches of annual snow by checking roof integrity and heating systems. The 13 days of high heat suggest that central air conditioning is a standard comfort requirement here.
Frequently Asked Questions
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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.