St. Louis County Climate
St. Louis County, Minnesota
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
37.8°F
Annual Precip
28.2"
Annual Snowfall
70.7"
Extreme Heat Days
2
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
3b
Minimum winter temperature range for plant survival
1,534
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: St. Louis County
Climate Verdict
St. Louis County has a cold, with an average annual temperature of 37.8°F, moderate rainfall of 28.2 inches per year, rare extreme heat with only 2.4214285714285717 days above 90°F annually, heavy winter snowfall averaging 70.7 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are severe, with January averaging a frigid 6.3°F. summers are pleasantly cool with July averaging 64.9°F. Residents experience a substantial 59°F difference between winter and summer.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
St. Louis County is 5.0°F cooler than the Minnesota statewide average of 42.8°F.
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 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.