Milwaukee County Climate
Milwaukee County, Wisconsin
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
48.5°F
Annual Precip
36.6"
Annual Snowfall
46.8"
Extreme Heat Days
13
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
2,812
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Milwaukee County
Climate Verdict
Milwaukee County has a cool, averaging 48.5°F annually, moderate rainfall of 36.6 inches per year, rare extreme heat with only 12.700000000000001 days above 90°F annually, moderate snowfall of 46.8 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 22.6°F. summers are warm — July averages 72.9°F. Residents experience a substantial 50°F difference between winter and summer.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
Milwaukee County is 4.1°F warmer than the Wisconsin statewide average of 44.4°F, it is somewhat wetter than average for Wisconsin.
Climate Profile
About Milwaukee County Weather
Wisconsin's Warmest Urban Climate
Milwaukee County is one of Wisconsin's warmest spots with a 48.5°F annual average, though it remains below the national median. The urban heat island and Lake Michigan proximity create a unique local climate.
Leading the State in Temperature
Milwaukee far exceeds the state average temperature of 44.4°F. It is also one of the state's wetter counties, recording 36.6 inches of precipitation annually.
Hotter and More Urbanized
Milwaukee is much warmer than Manitowoc to the north, which averages 44.7°F. It also records 13 extreme heat days, more than double the count of most surrounding counties.
Significant Heat and Moderate Winters
The county sees a warm 72.9°F July and a relatively mild 22.6°F January compared to the rest of the state. It still receives 46.8 inches of snow, though its 25.4°F winter average is Wisconsin's highest.
Cooling is Essential for Milwaukee
Cooling systems are a must here, as the 13 extreme heat days lead the region. Winter gear is still essential for the 47 inches of snow, but the cold is less biting than in inland Wisconsin.
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.