Deer Lodge County Climate
Deer Lodge County, Montana
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
43.8°F
Annual Precip
14.9"
Annual Snowfall
75.1"
Extreme Heat Days
10
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
1,559
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Deer Lodge County
Climate Verdict
Deer Lodge County has a cool, averaging 43.8°F annually, arid conditions receiving just 14.9 inches of precipitation annually, rare extreme heat with only 10.3 days above 90°F annually, heavy winter snowfall averaging 75.1 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 26.3°F. summers are pleasantly cool with July averaging 65.7°F. The 39°F seasonal variation provides noticeable but manageable change. December is typically the coldest month and July the warmest.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
Deer Lodge County closely matches the Montana statewide average temperature of 43.7°F.
Climate Profile
About Deer Lodge County Weather
Cool mountain air and heavy snow
Deer Lodge County averages 43.8°F annually, reflecting its high-altitude mountain environment. It is a snowy destination, receiving 75.1 inches of snowfall, which is significantly higher than the national median.
Typical Montana mountain weather
The county's 43.8°F average aligns almost perfectly with the Montana state average of 43.7°F. However, its 75.1 inches of snow more than doubles the totals seen in the eastern plains counties.
Snowier than the eastern plains
Compared to Fallon County’s 34.2 inches of snow, Deer Lodge is a winter wonderland with 75.1 inches. Its average temperature is nearly identical to Fergus County, but its mountainous terrain creates more dramatic local variations.
Mild summers and steady winters
Summer is brief and cool, with only 10 days reaching 90°F and a July average of 65.7°F. Winters are surprisingly stable, with a December through February average of 26.2°F, which is milder than many eastern Montana counties.
Gear up for snow
Residents should invest in high-quality snow removal equipment and winter tires to manage the 75.1 inches of annual snowfall. Air conditioning is rarely a necessity given that only 10 days a year reach extreme heat levels.
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.