Rolette County Climate
Rolette County, North Dakota
Avg Annual Temp
36.9°F
Annual Precip
20.0"
Annual Snowfall
—
Extreme Heat Days
4.2
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.