Milwaukee County Climate
Milwaukee County, Wisconsin
Avg Annual Temp
48.5°F
Annual Precip
36.6"
Annual Snowfall
46.8"
Extreme Heat Days
12.7
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.