Cass County Climate
Cass County, North Dakota
Avg Annual Temp
41.7°F
Annual Precip
23.6"
Annual Snowfall
42.9"
Extreme Heat Days
10.35
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Cass County Weather
A Classic Cold Continental Climate
Cass County's average annual temperature of 41.7°F sits more than 13 degrees below the national median. This humid continental climate experiences massive seasonal swings typical of the Upper Midwest.
Warmer and Wetter Than State Averages
The county is slightly warmer than the North Dakota average of 41.0°F. It is also significantly wetter than its peers, receiving 23.6 inches of precipitation compared to the state average of 19.5 inches.
A Milder Choice in the Valley
Compared to Cavalier County to the north, Cass is nearly five degrees warmer on average. It receives 42.9 inches of snow annually, which is standard for the Red River Valley region.
Frigid Winters Meet Ten Heat Days
January is bitter with an average of 8.5°F, while July peaks at a comfortable 70.2°F. Despite the cold, the county still logs 10 days a year where temperatures hit or exceed 90°F.
Prepare for Snow and Seasonal Shifts
Heavy-duty snow removal equipment is essential for managing the 42.9 inches of annual snowfall. Residents should also invest in high-efficiency heating to handle the 12.1°F winter average.
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.