Iron County Climate
Iron County, Wisconsin
Avg Annual Temp
40.8°F
Annual Precip
37.3"
Annual Snowfall
143.0"
Extreme Heat Days
2.8
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.