Hardin County Climate
Hardin County, Iowa
Avg Annual Temp
46.8°F
Annual Precip
36.7"
Annual Snowfall
29.1"
Extreme Heat Days
13.35
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Hardin County Weather
A Classic Four-Season Profile
Hardin County averages 46.8°F annually, placing it among the cooler continental climates in the United States. It maintains a consistent moisture profile with 36.7 inches of annual precipitation, slightly outpacing the national average.
Aligning With Iowa Norms
The county's climate closely mirrors state averages, though its 46.8°F annual temp is just over a degree cooler than the Iowa benchmark of 48.0°F. It receives 36.7 inches of rain, almost perfectly matching the statewide average of 36.1 inches.
Warmer Than Northern Neighbors
Hardin is noticeably warmer than Hancock County to the north, which averages just 45.5°F. This slight southern shift brings more heat, with Hardin experiencing 13 days of extreme heat compared to Hancock’s eight.
Steamy Summers and Snowy Winters
Summer temperatures peak at a July average of 72.7°F, accompanied by 13 days reaching 90°F or higher. Winter brings 29.1 inches of snow and a chilly January average of 17.0°F.
Prepare for Variable Weather
With nearly 30 inches of snow and a dozen extreme heat days, homes need both reliable air conditioning and heavy-duty insulation. Outdoor planning should account for the 36.7 inches of annual precipitation that keeps the local landscape lush.
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.