McLean County Climate
McLean County, North Dakota
Avg Annual Temp
41.2°F
Annual Precip
18.1"
Annual Snowfall
43.6"
Extreme Heat Days
13.087500000000002
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About McLean County Weather
Upper Midwest Temperature Extremes
McLean County's annual average of 41.2°F is more than 10 degrees cooler than the national median. This climate requires resilient infrastructure to handle large seasonal swings.
Right at the State Average
The county's 41.2°F average temperature perfectly mirrors the North Dakota average of 41.0°F. Precipitation is also typical for the region at 18.1 inches annually.
Typical Snowfall for the Region
The county's 43.6 inches of snow is similar to McKenzie's 42.3 inches but lower than Mountrail's 48.5 inches. This makes it a standard representative for Central North Dakota weather.
Frigid Januaries and Moderate Summers
January brings average temperatures of 10.6°F, while July heats up to 69.3°F. Residents experience about 13 days of extreme heat and a summer average of 67.0°F.
Insulate Against the Winter Chill
With winter averages of 13.8°F, proper attic insulation is a top priority for homeowners. Be ready for significant snow cleanup throughout the 43.6-inch winter season.
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.