Deer Lodge County Climate
Deer Lodge County, Montana
Avg Annual Temp
43.8°F
Annual Precip
14.9"
Annual Snowfall
75.1"
Extreme Heat Days
10.3
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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.
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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.