Roseau County Climate
Roseau County, Minnesota
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
36.6°F
Annual Precip
27.7"
Annual Snowfall
—
Extreme Heat Days
2
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
3b
Minimum winter temperature range for plant survival
1,621
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Roseau County
Climate Verdict
Roseau County has a cold, with an average annual temperature of 36.6°F, moderate rainfall of 27.7 inches per year, rare extreme heat with only 2.2 days above 90°F annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are severe, with January averaging a frigid 2.6°F. summers are pleasantly cool with July averaging 65.8°F. Residents experience a substantial 63°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Roseau County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Roseau County is 6.2°F cooler than the Minnesota statewide average of 42.8°F, it is somewhat drier than average for Minnesota.
Climate Profile
About Roseau County Weather
Subarctic Chills on the Northern Border
Roseau County is one of the coldest spots in the lower 48 with an average annual temperature of only 36.6°F. This is nearly 17 degrees colder than the national median, placing it firmly in a continental subarctic climate zone.
Far Below the State Average
The county's average of 36.6°F is significantly lower than the Minnesota state average of 42.8°F. It consistently ranks as one of the coldest counties in the state due to its position on the Canadian border.
Cold Even by Northern Standards
Compared to Kittson County to the west, Roseau maintains a similarly frigid profile with just 27.7 inches of annual precipitation. It lacks the lake-effect moderation found further east, leading to more stable but extreme cold.
Brutal Winters and Mild Summers
Winter averages are a punishing 6.6°F, while summers remain mild with a July average of 65.8°F. The county only sees about 2 days per year where temperatures reach or exceed 90°F.
Winter Survival and Heating Focus
High-efficiency heating systems and heavy-duty insulation are non-negotiable for the 6.6°F winter average. Residents rarely need intensive air conditioning given the rare occurrence of extreme heat days.
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.