Adair County Climate
Adair County, Iowa
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
49.1°F
Annual Precip
36.5"
Annual Snowfall
25.5"
Extreme Heat Days
19
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5b
Minimum winter temperature range for plant survival
3,164
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Adair County
Climate Verdict
Adair County has a cool, averaging 49.1°F annually, moderate rainfall of 36.5 inches per year, rare extreme heat with only 18.8 days above 90°F annually, moderate snowfall of 25.5 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 20.2°F. summers are warm — July averages 74.3°F. Residents experience a substantial 54°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Adair County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Adair County closely matches the Iowa statewide average temperature of 48.0°F.
Climate Profile
About Adair County Weather
Adair's Temperature Falls Below National Median
Adair County averages 49.1°F annually, sitting several degrees below the national median of 53.0°F. This humid continental climate experiences sharp transitions between the four seasons.
Warmer Than the Iowa Average
Adair is warmer than the Iowa state average of 48.0°F. It ranks among the warmer southern third of counties in the state.
A Temperate Presence in Central Iowa
Its 49.1°F average is nearly identical to Black Hawk County but cooler than southern Appanoose. It records 36.5 inches of annual precipitation, closely matching the state mean.
Hot Summers and Snowy Winters
Residents face 19 extreme heat days where temperatures top 90°F annually. Winters bring an average of 25.5 inches of snow, with January lows dipping to 20.2°F.
Preparing for Adair's Climate Extremes
Ensure HVAC systems can handle nearly three weeks of 90-degree heat each summer. Winter preparations should account for over two feet of annual 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.