Iron County Climate
Iron County, Wisconsin
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
40.8°F
Annual Precip
37.3"
Annual Snowfall
143.0"
Extreme Heat Days
3
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
4a
Minimum winter temperature range for plant survival
1,860
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Iron County
Climate Verdict
Iron County has a cool, averaging 40.8°F annually, moderate rainfall of 37.3 inches per year, rare extreme heat with only 2.8 days above 90°F annually, heavy winter snowfall averaging 143.0 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 12.4°F. summers are pleasantly cool with July averaging 66.7°F. Residents experience a substantial 54°F difference between winter and summer.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
Iron County is 3.5°F cooler than the Wisconsin statewide average of 44.4°F, it is somewhat wetter than average for Wisconsin.
Climate Profile
About Iron County Weather
Deep North Cold and High Snowfall
Iron County is one of the coldest regions in the country with an annual average of just 40.8°F. This is a staggering 13 degrees below the national median, creating a true Northwoods climate.
Among Wisconsin’s Coldest Counties
With an average of 40.8°F, Iron County sits 3.6 degrees below the state average of 44.4°F. It consistently ranks as one of the most frigid jurisdictions in Wisconsin.
The Snow King of the North
Iron County’s 143 inches of snow dwarfs the 44.5 inches seen in Jackson County. Even compared to other northern neighbors, its winter intensity is unmatched.
Short Summers and Intense Winters
Summer is brief with only 3 days hitting 90°F and a July average of 66.7°F. Winter dominates the year, featuring a brutal 15.6°F average and over 11 feet of annual snow.
Serious Winter Readiness Required
Heavy-duty snowblowers and structural roof reinforcements are necessary to handle 143 inches of snow. Vehicles require winter tires and emergency kits to navigate the 12.4°F January lows.
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.