Marathon County Climate
Marathon County, Wisconsin
Avg Annual Temp
43.6°F
Annual Precip
33.4"
Annual Snowfall
56.6"
Extreme Heat Days
5
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Marathon County Weather
Core Wisconsin Climate Extremes
Marathon County’s 43.6°F annual average reflects a true Northwoods climate that is significantly cooler than the national median. This central region experiences a wide range of seasonal extremes.
Slightly Cooler Than the State Norm
The county is roughly one degree cooler than the statewide average of 44.4°F. It receives 33.4 inches of precipitation, putting it just under the Wisconsin norm of 34.5 inches.
Warmer Than the Far North
Marathon is warmer than northern neighbors Lincoln and Langlade, which both average 41.4°F. However, it experiences more extreme heat days than its lakeside peers in Manitowoc.
Formidable Winters and Solid Summers
With 56.6 inches of annual snowfall and a 14.8°F January average, winters are formidable. July warms to a 69.5°F average, featuring about 5 days of 90°F heat.
Preparing for All Four Seasons
A dual-season approach is required to handle the 18.0°F winter average and the occasional 90°F summer spikes. Reliable snow tires are essential for navigating the nearly 57 inches of annual snowfall.
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.