Ozaukee County Climate
Ozaukee County, Wisconsin
Avg Annual Temp
46.7°F
Annual Precip
33.9"
Annual Snowfall
42.3"
Extreme Heat Days
4.8
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Ozaukee County Weather
A Lake-Moderated Climate
Ozaukee County averages 46.7°F annually, which is about 7 degrees cooler than the U.S. median. Proximity to Lake Michigan helps buffer the temperature extremes seen further inland.
Warmest on the List
Ozaukee is significantly warmer than the Wisconsin state average of 44.4°F. This 46.7°F average makes it one of the most temperate spots in the state.
Milder Than Inland Neighbors
Compared to Outagamie (45.2°F) or Monroe (45.4°F), Ozaukee stays noticeably warmer in the winter. Its 42.3 inches of snow is also much lower than the 50-70 inches seen elsewhere.
Milder Winters and Pleasant Summers
The winter average of 25.2°F is the highest among these counties, while snowfall remains a manageable 42.3 inches. Summers stay comfortable with a July average of 70.1°F.
Watch for Lake Effects
While winters are warmer, residents should still prepare for lake-effect snow events that can cause sudden accumulation. Summer cooling needs are moderate with only 5 days over 90°F annually.
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.