Calhoun County Climate
Calhoun County, Iowa
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
47.2°F
Annual Precip
33.8"
Annual Snowfall
32.1"
Extreme Heat Days
13
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
2,888
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Calhoun County
Climate Verdict
Calhoun County has a cool, averaging 47.2°F annually, moderate rainfall of 33.8 inches per year, rare extreme heat with only 12.5 days above 90°F annually, moderate snowfall of 32.1 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 17.4°F. summers are warm — July averages 72.9°F. Residents experience a substantial 56°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Calhoun County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Calhoun County closely matches the Iowa statewide average temperature of 48.0°F, it is somewhat drier than average for Iowa.
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
What is the average temperature in Calhoun County?
How much rain does Calhoun County get?
Does it snow in Calhoun County?
How hot does Calhoun County get in summer?
How cold are winters in Calhoun County?
Track your own weather in Calhoun County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
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.