Iowa County Climate
Iowa County, Iowa
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
48.2°F
Annual Precip
37.7"
Annual Snowfall
28.1"
Extreme Heat Days
17
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5b
Minimum winter temperature range for plant survival
2,981
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Iowa County
Climate Verdict
Iowa County has a cool, averaging 48.2°F annually, moderate rainfall of 37.7 inches per year, rare extreme heat with only 17.2 days above 90°F annually, moderate snowfall of 28.1 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 19.4°F. summers are warm — July averages 73.3°F. Residents experience a substantial 54°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Iowa County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Iowa County closely matches the Iowa statewide average temperature of 48.0°F.
Climate Profile
About Iowa County Weather
A Balanced Continental Profile
Iowa County records an annual average temperature of 48.2°F, placing it near the middle of the state's climate spectrum. It receives 37.7 inches of annual precipitation, slightly more than the national median.
Mirroring the State Average
Iowa County's 48.2°F temperature almost perfectly matches the statewide average of 48.0°F. It is slightly wetter than the state norm, receiving 37.7 inches of rain and snow compared to the 36.1-inch Iowa average.
Cooler and Snowier than Henry
Iowa County is cooler than Henry County to its south, which averages 49.6°F. It also sees more winter precipitation, recording 28.1 inches of snow compared to Henry's 25.3 inches.
Defined Seasons and Sudden Heat
The county experiences 17 days of extreme heat per year, primarily during a July that averages 73.3°F. Winter is cold and snowy, with 28.1 inches of accumulation and a January average of 19.4°F.
Equip for Both Extremes
The 17 days of 90°F heat require efficient air conditioning, while 28 inches of snow demand reliable winter tools. Homeowners should also prepare for 37.7 inches of annual precipitation with proper drainage and roofing.
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.