Macomb County Climate
Macomb County, Michigan
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
48.4°F
Annual Precip
35.4"
Annual Snowfall
39.4"
Extreme Heat Days
13
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6b
Minimum winter temperature range for plant survival
2,706
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Macomb County
Climate Verdict
Macomb County has a cool, averaging 48.4°F annually, moderate rainfall of 35.4 inches per year, rare extreme heat with only 12.65 days above 90°F annually, moderate snowfall of 39.4 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 24.0°F. summers are warm — July averages 72.3°F. The 48°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Macomb County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Macomb County closely matches the Michigan statewide average temperature of 45.7°F.
Climate Profile
About Macomb County Weather
A Warmer Midwestern Urban Hub
Macomb County averages 48.4°F annually, which is slightly warmer than its rural neighbors but still below the national median. The urban heat island effect contributes to its milder thermal profile.
Significantly Above State Averages
At 48.4°F, Macomb is much warmer than the Michigan average of 45.7°F. It ranks as one of the warmest counties in the state, driven by its southern location and proximity to Lake St. Clair.
Similar to Its Southern Peers
Macomb shares nearly identical temperature and precipitation stats with Lenawee County. Both counties receive over 35 inches of precipitation and experience higher-than-average extreme heat days.
Hot Summers and Steady Snow
July brings an average of 72.3°F with 13 extreme heat days peaking above 90°F. Winter remains active with 39.4 inches of snowfall and a January average of 24.0°F.
Balance Cooling and Salting
Plan for 13 days of high AC usage during the summer months to combat extreme heat. For winter, residents need standard snow removal tools to handle the nearly 40 inches of annual accumulation.
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.