Benton County Climate
Benton County, Iowa
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
47.1°F
Annual Precip
37.0"
Annual Snowfall
30.8"
Extreme Heat Days
12
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
2,785
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Benton County
Climate Verdict
Benton County has a cool, averaging 47.1°F annually, moderate rainfall of 37.0 inches per year, rare extreme heat with only 12.4 days above 90°F annually, moderate snowfall of 30.8 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 18.1°F. summers are warm — July averages 72.0°F. Residents experience a substantial 54°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Benton County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Benton County closely matches the Iowa statewide average temperature of 48.0°F.
Climate Profile
About Benton County Weather
Benton Experiences a Traditional Four-Season Climate
Benton County averages 47.1°F, trailing the national median by nearly 6 degrees. The county experiences moderate annual precipitation of 37.0 inches.
Representative of Central Iowa Weather
It sits just below the Iowa state average of 48.0°F. This makes it highly representative of the central Iowa climate corridor.
Similar Temperatures with Higher Rainfall
Benton closely mirrors Audubon in temperature but receives more rain at 37.0 inches. This precipitation level is higher than the state average of 36.1 inches.
Moderate Snowfall and Summer Heat
Residents see 12 days of 90-degree heat and 30.8 inches of annual snow. January is the coldest month, averaging 18.1°F.
Tires and Drainage for Damp Conditions
Winter tires are advisable to manage the 30-plus inches of snow. Homeowners should prepare for a damp climate with 37 inches of annual precipitation.
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.