Lee County Climate
Lee County, Iowa
Avg 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
Seasonal Overview
National Comparison
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 source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.