Flathead County Climate
Flathead County, Montana
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
42.4°F
Annual Precip
23.6"
Annual Snowfall
70.8"
Extreme Heat Days
11
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
1,374
Limited to cold-tolerant varieties
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Flathead County
Climate Verdict
Flathead County has a cool, averaging 42.4°F annually, semi-arid conditions with only 23.6 inches of annual precipitation, rare extreme heat with only 10.957142857142857 days above 90°F annually, heavy winter snowfall averaging 70.8 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 23.1°F. summers are pleasantly cool with July averaging 64.4°F. The 41°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
Flathead County closely matches the Montana statewide average temperature of 43.7°F, it is also noticeably wetter, receiving 8.2 inches more precipitation than the state average.
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 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.