Winnebago County Climate
Winnebago County, Wisconsin
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
46.5°F
Annual Precip
31.9"
Annual Snowfall
39.2"
Extreme Heat Days
7
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5b
Minimum winter temperature range for plant survival
2,630
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Winnebago County
Climate Verdict
Winnebago County has a cool, averaging 46.5°F annually, moderate rainfall of 31.9 inches per year, rare extreme heat with only 6.6 days above 90°F annually, moderate snowfall of 39.2 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 18.3°F. summers are warm — July averages 71.8°F. Residents experience a substantial 53°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Winnebago County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Winnebago County closely matches the Wisconsin statewide average temperature of 44.4°F, it is somewhat drier than average for Wisconsin.
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
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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.