Warren County Climate
Warren County, Iowa
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
49.9°F
Annual Precip
37.8"
Annual Snowfall
30.8"
Extreme Heat Days
18
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5b
Minimum winter temperature range for plant survival
3,252
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Warren County
Climate Verdict
Warren County has a cool, averaging 49.9°F annually, moderate rainfall of 37.8 inches per year, rare extreme heat with only 17.8 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 21.7°F. summers are warm — July averages 74.7°F. Residents experience a substantial 53°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Warren County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Warren County closely matches the Iowa statewide average temperature of 48.0°F.
Climate Profile
About Warren County Weather
Warren County's Mid-Latitude Climate
Warren County maintains an annual average temperature of 49.9°F, roughly four degrees below the national median. Its position in the heart of the country creates a true continental weather pattern.
Typical Temperatures for Central Iowa
The county's 49.9°F average is slightly warmer than the state's 48.0°F mark. Annual precipitation of 37.8 inches also tracks closely with the Iowa state average of 36.1 inches.
Colder Winters Than Southern Neighbors
While Warren averages 49.9°F, it is cooler than neighboring Wapello at 50.7°F. Snowfall is also heavier here than in the south, reaching 30.8 inches annually.
Snowy Winters and Humid Summers
Winter snowfall hits 30.8 inches, significantly more than the counties to the southeast. Summer features a July average of 74.7°F with about 18 days reaching 90°F or higher.
Invest in Heavy Winter Gear
With over 30 inches of annual snow, a powerful snowblower is a wise investment for local homeowners. Ensure your heating system is serviced before January, when temperatures drop to an average of 21.7°F.
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.