Mahnomen County Climate
Mahnomen County, Minnesota
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
39.9°F
Annual Precip
26.4"
Annual Snowfall
—
Extreme Heat Days
5
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
4a
Minimum winter temperature range for plant survival
2,046
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Mahnomen County
Climate Verdict
Mahnomen County has a cold, with an average annual temperature of 39.9°F, moderate rainfall of 26.4 inches per year, rare extreme heat with only 5.4 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 6.3°F. summers are pleasantly cool with July averaging 68.1°F. Residents experience a substantial 62°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Mahnomen County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Mahnomen County closely matches the Minnesota statewide average temperature of 42.8°F, it is somewhat drier than average for Minnesota.
Climate Profile
About Mahnomen County Weather
A True Northern Continental Climate
Mahnomen County sits at an average annual temperature of 39.9°F, significantly cooler than the national median of approximately 54°F. This reflects a humid continental climate characterized by profound seasonal shifts.
Cooler Than the Minnesota Average
The county's 39.9°F annual average trails the statewide mean of 42.8°F. It ranks among the chillier northern counties, receiving about 26.4 inches of precipitation annually compared to the state average of 30.0 inches.
Comparing North Country Climates
Mahnomen is slightly warmer than neighboring Marshall County to the north, which averages 39.3°F. However, it remains much colder than southern counties like Martin, which stays over six degrees warmer on average.
Deep Freezes and Mild Summers
January temperatures plummet to a 6.3°F average, while July remains comfortable at 68.1°F. Residents only face five days of extreme heat above 90°F each year.
Winter Resilience is Key
Homeowners should prioritize high-efficiency heating systems capable of handling extreme sub-zero January lows. While snowfall data is limited, the 10.4°F winter average demands heavy-duty insulation and thermal gear.
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.