Shiawassee County Climate
Shiawassee County, Michigan
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
47.7°F
Annual Precip
33.8"
Annual Snowfall
38.3"
Extreme Heat Days
11
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
2,613
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Shiawassee County
Climate Verdict
Shiawassee County has a cool, averaging 47.7°F annually, moderate rainfall of 33.8 inches per year, rare extreme heat with only 10.933333333333335 days above 90°F annually, moderate snowfall of 38.3 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 22.9°F. summers are warm — July averages 71.2°F. The 48°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Shiawassee County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Shiawassee County closely matches the Michigan statewide average temperature of 45.7°F.
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 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.