Lenawee County Climate
Lenawee County, Michigan
Avg Annual Temp
48.6°F
Annual Precip
35.4"
Annual Snowfall
30.4"
Extreme Heat Days
15.633333333333336
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Lenawee County Weather
One of Michigan's Warmest Corners
Lenawee County averages 48.6°F annually, which is warmer than most of the state but still stays below the national median. Its southern border location provides a slightly longer growing season than northern neighbors.
Leading the State in Temperature
At 48.6°F, Lenawee is significantly warmer than the Michigan state average of 45.7°F. It experiences 16 extreme heat days per year, which is among the highest counts in the state.
Hotter and Wetter Than Neighbors
Lenawee receives 35.4 inches of precipitation, outpacing Livingston and Lapeer. It is the warmest among its regional peers, recording higher summer averages and more frequent 90°F days.
Sunny Summers and Brisk Winters
July averages a warm 71.9°F, while January dips to 23.8°F. The county receives a manageable 30.4 inches of snow, the lowest total among this group of Michigan counties.
Prepare for Summer Humidity
High-efficiency air conditioning is a priority given the 16 annual extreme heat days. Residents can manage with lighter snow removal equipment compared to the lake-effect belts in the north.
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.