Hardin County Climate
Hardin County, Iowa
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
46.8°F
Annual Precip
36.7"
Annual Snowfall
29.1"
Extreme Heat Days
13
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
2,834
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Hardin County
Climate Verdict
Hardin County has a cool, averaging 46.8°F annually, moderate rainfall of 36.7 inches per year, rare extreme heat with only 13.35 days above 90°F annually, moderate snowfall of 29.1 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 17.0°F. summers are warm — July averages 72.7°F. Residents experience a substantial 56°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Hardin County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Hardin County closely matches the Iowa statewide average temperature of 48.0°F.
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 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.