Marathon County Climate
Marathon County, Wisconsin
NOAA NCEI 1991-2020 Climate NormalsAvg 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
Growing Season & Gardening
4b
Minimum winter temperature range for plant survival
2,238
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Marathon County
Climate Verdict
Marathon County has a cool, averaging 43.6°F annually, moderate rainfall of 33.4 inches per year, rare extreme heat with only 5 days above 90°F annually, moderate snowfall of 56.6 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 14.8°F. summers are pleasantly cool with July averaging 69.5°F. Residents experience a substantial 55°F difference between winter and summer.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
Marathon County closely matches the Wisconsin statewide average temperature of 44.4°F.
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 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.