Lee County Climate
Lee County, Iowa
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
52.0°F
Annual Precip
39.4"
Annual Snowfall
22.4"
Extreme Heat Days
25
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
3,572
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Lee County
Climate Verdict
Lee County has a mild, with an average annual temperature of 52.0°F, moderate rainfall of 39.4 inches per year, occasional hot days — 25 per year above 90°F, moderate snowfall of 22.4 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 24.6°F. summers are warm — July averages 76.1°F. Residents experience a substantial 52°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Lee County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Lee County is 4.0°F warmer than the Iowa statewide average of 48.0°F, it is somewhat wetter than average for Iowa.
Climate Profile
About Lee County Weather
Lee County's Warmest Iowa Climate
Lee County averages 52.0°F annually, the closest in this region to the national median temperature. Located in the far southeast, it features longer summers and shorter winters.
Leading the State in Heat
Lee is significantly warmer than the Iowa state average of 48.0°F. It is also one of the wettest counties, receiving 39.4 inches of annual precipitation compared to the 36.1-inch state norm.
A Regional Hot Spot
Lee experiences 25 extreme heat days per year, the highest in this group. It is both warmer and wetter than Jefferson County, its neighbor to the northwest.
Long Summers and Mild Winters
July is hot with a 76.1°F average and 25 days over 90°F. Winters are the mildest in Iowa, seeing only 22.4 inches of snow and a 27.8°F winter-long average.
Cooling and Rain Management
Strong air conditioning is vital for the 25 days of extreme heat each year. With nearly 40 inches of rain, residents should ensure proper landscape grading to prevent home flooding.
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.