Winnebago County Climate
Winnebago County, Wisconsin
Avg Annual Temp
46.5°F
Annual Precip
31.9"
Annual Snowfall
39.2"
Extreme Heat Days
6.6
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Winnebago County Weather
Warm for the Upper Midwest
Winnebago’s 46.5°F average annual temperature is relatively warm for Wisconsin, though still cooler than the U.S. average. Its location near large water bodies influences its local humidity and temperature patterns.
Leading the State in Heat
Winnebago is about 2 degrees warmer than the state average of 44.4°F. This makes it one of the more temperate counties in the Fox Valley region.
Lower Snowfall Than Central Neighbors
The county receives just 39.2 inches of snow, which is significantly less than Wood or Waupaca counties. Its winter average of 21.5°F is among the highest in this group.
Sunniest Summers in the Group
Winnebago averages 71.8°F in July, the highest summer average among its neighbors. However, it still maintains a brisk January average of 18.3°F.
Prepare for Warm Lake Breezes
The 31.9 inches of annual precipitation is lower than the state average, meaning fewer heavy rain events. Focus on home cooling solutions to handle the 71.8°F July average and periodic 90°F days.
Frequently Asked Questions
What is the average temperature in Winnebago County?
How much rain does Winnebago County get?
Does it snow in Winnebago County?
How hot does Winnebago County get in summer?
How cold are winters in Winnebago County?
Track your own weather in Winnebago County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
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.