St. Louis County Climate
St. Louis County, Minnesota
Avg Annual Temp
37.8°F
Annual Precip
28.2"
Annual Snowfall
70.7"
Extreme Heat Days
2.4214285714285717
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About St. Louis County Weather
The Epicenter of Northwoods Cold
St. Louis County averages 37.8°F annually, making it one of the coldest large counties in the United States. Its 28.2 inches of precipitation is below the national median but results in massive snowfall due to the cold.
Well Below the State Average
At 37.8°F, the county is exactly 5 degrees colder than the Minnesota state average. It ranks as one of the coldest jurisdictions in the state, influenced by both its northern latitude and Lake Superior.
Snowier than the Interior
With 70.7 inches of snow, St. Louis County receives significantly more frozen precipitation than Stearns or Sherburne. Its July average of 64.9°F is much cooler than the 70-plus averages seen further south.
Extreme Snow and Rare Heat
Winter is the dominant season with 70.7 inches of snowfall and an average temperature of 10.1°F. Extreme heat is nearly non-existent, with only 2 days per year reaching 90°F.
Built for the Long Winter
Residents must invest in heavy-duty snow removal and vehicle winterization to handle over 70 inches of snow. High-performance insulation is a priority over air conditioning, which is rarely needed.
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.