Greene County Climate
Greene County, Iowa
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
47.8°F
Annual Precip
35.3"
Annual Snowfall
31.7"
Extreme Heat Days
19
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
2,966
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Greene County
Climate Verdict
Greene County has a cool, averaging 47.8°F annually, moderate rainfall of 35.3 inches per year, rare extreme heat with only 18.7 days above 90°F annually, moderate snowfall of 31.7 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 18.4°F. summers are warm — July averages 73.1°F. Residents experience a substantial 55°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Greene County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Greene County closely matches the Iowa statewide average temperature of 48.0°F.
Climate Profile
About Greene County Weather
Classic interior continental weather
Greene County averages 47.8°F annually, falling below the national temperature median. It receives 35.3 inches of precipitation, making it a standard representation of the Midwestern climate.
Typical Iowa temperature and rainfall
The county's 47.8°F average temperature is very close to the state average of 48.0°F. Its 35.3 inches of annual precipitation also tracks closely with the state average of 36.1 inches.
Warmer than its northern neighbors
Greene County is warmer than Hamilton County, which averages just 46.1°F. It also records 31.7 inches of snow, slightly more than Franklin County's 30.0 inches.
Hot summers with snowy stretches
Summer heat is common here, with an average of 19 days hitting at least 90°F. Winters are cold, averaging 18.4°F in January with 31.7 inches of annual snowfall.
Prepare for summer heat waves
With nearly three weeks of 90-degree weather, cooling capacity is a priority for local homes. Winter planning should account for a 21.8°F seasonal average and steady snowfall.
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.