Rolette County Climate
Rolette County, North Dakota
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
36.9°F
Annual Precip
20.0"
Annual Snowfall
—
Extreme Heat Days
4
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
3b
Minimum winter temperature range for plant survival
1,629
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Rolette County
Climate Verdict
Rolette County has a cold, with an average annual temperature of 36.9°F, semi-arid conditions with only 20.0 inches of annual precipitation, rare extreme heat with only 4.2 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 4.9°F. summers are pleasantly cool with July averaging 65.8°F. Residents experience a substantial 61°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Rolette County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Rolette County is 4.0°F cooler than the North Dakota statewide average of 40.9°F.
Climate Profile
About Rolette County Weather
Among the Nation's Coldest
Rolette County's annual average temperature is a low 36.9°F, making it one of the coldest counties in the contiguous United States. This sub-arctic climate features very brief summers.
Well Below the State Median
The county is more than four degrees colder than the North Dakota state average of 41.0°F. Its precipitation of 20.0 inches is slightly above the state's 19.5-inch average.
Regional Cold Leader
Rolette is significantly colder than neighboring Renville (38.3°F) and Pierce (38.8°F). It experiences very few hot days, seeing 90°F only 4 times a year.
Cool Summers, Deep Freeze Winters
July is very mild with an average of 65.8°F, while winter averages just 8.0°F. January temperatures drop to a 4.9°F average, and extreme heat is nearly non-existent.
Maximize Home Insulation
Heating is the primary climate concern for residents facing the 36.9°F annual average. While snowfall data is limited, the long 8.0°F winters require substantial fuel and gear preparation.
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.