Boone County Climate
Boone County, Iowa
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
48.8°F
Annual Precip
37.5"
Annual Snowfall
34.3"
Extreme Heat Days
15
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
3,120
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Boone County
Climate Verdict
Boone County has a cool, averaging 48.8°F annually, moderate rainfall of 37.5 inches per year, rare extreme heat with only 15.2 days above 90°F annually, moderate snowfall of 34.3 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 19.5°F. summers are warm — July averages 73.8°F. Residents experience a substantial 54°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Boone County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Boone County closely matches the Iowa statewide average temperature of 48.0°F.
Climate Profile
About Boone County Weather
A Classic Humid Continental Pattern
Boone County averages 48.8°F, staying below the national median of 53°F. It experiences a classic weather pattern with 37.5 inches of precipitation.
Typical Temperatures for Middle Iowa
At 48.8°F, it is slightly warmer than the Iowa average of 48.0°F. It represents the temperate middle ground of the state's climate.
Wetter Conditions than Western Neighbors
Its 37.5 inches of precipitation is higher than neighbor Audubon. It tracks closely with Black Hawk in terms of temperature and annual heat days.
Cold Januaries and Hot Julys
Winters bring 34.3 inches of snow and a 19.5°F average in January. Summers are warm, featuring 15 days of temperatures exceeding 90°F.
Preparing for Large Seasonal Swings
Budget for both significant heating and cooling due to the sharp seasonal shifts. Reliable snow removal is essential for managing the 34.3 inches of annual accumulation.
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.