Glacier County Climate
Glacier County, Montana
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
39.9°F
Annual Precip
20.1"
Annual Snowfall
—
Extreme Heat Days
5
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
4b
Minimum winter temperature range for plant survival
1,082
Limited to cold-tolerant varieties
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Glacier County
Climate Verdict
Glacier County has a cold, with an average annual temperature of 39.9°F, semi-arid conditions with only 20.1 inches of annual precipitation, rare extreme heat with only 4.959999999999999 days above 90°F annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 21.5°F. summers are pleasantly cool with July averaging 61.5°F. The 40°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Glacier County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Glacier County is 3.8°F cooler than the Montana statewide average of 43.7°F, it is somewhat wetter than average for Montana, the county experiences 16.704545068027215 fewer extreme heat days than the state average.
Climate Profile
About Glacier County Weather
One of the nation's coldest northern outposts
Glacier County is significantly colder than the national average, posting a brisk annual mean of 39.9°F. Its 20.1 inches of annual precipitation provides more moisture than many of its eastern Montana neighbors.
Well below the Montana temperature average
At 39.9°F, Glacier County sits nearly four degrees cooler than the Montana state average of 43.7°F. It represents the colder, high-latitude bracket of the state's climate profile.
Chillier than its southern and eastern peers
Glacier County is notably colder than Hill County (42.1°F) and Lake County (45.9°F). It experiences much shorter growing seasons than most surrounding regions.
Mild summers and steady winter cold
Extreme heat is rare here, with only 5 days a year topping 90°F and a July average of 61.5°F. While specific annual snowfall data is limited, winter temperatures consistently hover near a 22.2°F average.
Focus on high-efficiency heating systems
Air conditioning is rarely a necessity given the cool 58.7°F summer average. Residents should instead prioritize heavy-duty insulation and reliable heating to manage the persistent cold that defines the region.
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.