Monroe County Climate
Monroe County, Michigan
Avg Annual Temp
49.4°F
Annual Precip
34.7"
Annual Snowfall
40.2"
Extreme Heat Days
12.666666666666666
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Monroe County Weather
Monroe County Is Michigan's Warmest Set Member
Monroe averages 49.4°F annually, making it the warmest county in this group. While still cooler than the 53°F national median, it represents the milder side of the Midwest.
Well Above the Michigan State Average
The county is nearly 4 degrees warmer than the state average of 45.7°F. Its southern location on Lake Erie provides a longer, warmer growing season than most of Michigan.
Warmer and Drier Than Its Northern Peers
Monroe is much warmer than Midland (48.0°F) and faces far less snow than the northern counties. It only sees about 40 inches of snow, roughly a third of what Marquette receives.
Thirteen Days of Extreme Summer Heat
Monroe leads the group with 13 days over 90°F and a July average of 72.8°F. Winters are the mildest in the group, with a December-February average of 27.3°F.
Invest in High-Quality Air Conditioning
With 13 extreme heat days, central air is a critical comfort for Monroe residents. Snow removal is less demanding here, but homeowners should still be prepared for 40 inches of annual accumulation.
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.