Fond du Lac County Climate
Fond du Lac County, Wisconsin
Avg Annual Temp
45.5°F
Annual Precip
30.4"
Annual Snowfall
37.8"
Extreme Heat Days
5.566666666666667
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Fond du Lac County Weather
A Classic Northern Climate
Fond du Lac County records an annual average temperature of 45.5°F, following the cooler-than-average trend of the Great Lakes region. Its precipitation levels of 30.4 inches sit below the national average for humid continental zones.
Warmer Than the State Median
At 45.5°F, the county is slightly warmer than the 44.4°F Wisconsin state average. However, it is drier than many of its peers, receiving about 4 inches less annual precipitation than the state average.
Drier than Green Lake
Fond du Lac receives 30.4 inches of precipitation, notably less than Green Lake’s 36.0 inches. It also sees less snow than its western neighbor, averaging 37.8 inches compared to Green Lake's 45.5 inches.
Stable Summers and Cold Winters
July averages a comfortable 70.5°F, and the county typically sees 6 days of extreme heat above 90°F. Winter temperatures average 20.8°F, which is relatively mild compared to the far northern reaches of the state.
Prepare for Lake-Effect Shifts
Heating systems should be optimized for a January average of 17.7°F. While snowfall is moderate at 37.8 inches, residents should remain prepared for sudden winter storms typical of the Fox Valley area.
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.