Shiawassee County Climate
Shiawassee County, Michigan
Avg Annual Temp
47.7°F
Annual Precip
33.8"
Annual Snowfall
38.3"
Extreme Heat Days
10.933333333333335
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Shiawassee County Weather
Moderate Michigan climate with typical rainfall
Shiawassee County averages 47.7°F annually, placing it closer to national norms than northern Michigan. It receives 33.8 inches of annual precipitation, nearly matching the state average.
Warmer than the average Michigan county
The county's 47.7°F average temperature is 2 degrees higher than the Michigan state average of 45.7°F. This reflects its position in the more temperate southern half of the state.
Warmer summer spikes than nearby counties
While sharing a 47.7°F average with Saginaw, Shiawassee experiences more extreme heat with 11 days above 90°F. This is the highest heat count among all analyzed neighboring counties.
Hot summers and manageable snow totals
July averages 71.2°F, and the 11 days of extreme heat define the summer experience. Winters are milder than the north, with only 38.3 inches of snow and January averages of 22.9°F.
Plan for summer cooling and moderate snow
With 11 days of extreme heat, reliable air conditioning is more important here than in most Michigan counties. The 38.3 inches of snow is light by regional standards, making standard clearing tools sufficient.
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.