Flathead County Climate
Flathead County, Montana
Avg Annual Temp
42.4°F
Annual Precip
23.6"
Annual Snowfall
70.8"
Extreme Heat Days
10.957142857142856
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Flathead County Weather
Cool, wet mountain living
Flathead County averages 42.4°F, kept cool by its northern latitude and mountainous terrain. It is much wetter than the national median, receiving 23.6 inches of precipitation and 70.8 inches of snow.
A moisture-rich mountain haven
At 23.6 inches of precipitation, Flathead is significantly wetter than the Montana average of 15.4 inches. It is also cooler than the state average, sitting at 42.4°F compared to 43.7°F.
Wetter than the central plains
Flathead receives nearly 7 inches more precipitation than Fergus County and is much snowier than the eastern plains. Its 70.8 inches of snow is typical for the western side of the Continental Divide.
Mild summers and deep snow
Summers are exceptionally mild with only 11 days above 90°F and a July average of 64.4°F. Winter is defined by 70.8 inches of snow and a consistent winter average of 24.0°F.
Manage the moisture
Waterproofing and moisture-wicking gear are essential for the 23.6 inches of annual precipitation. Homeowners should prioritize roof maintenance and snow load capacity to handle the 70.8 inches of annual snowfall.
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.