Mineral County Climate
Mineral County, Montana
Avg Annual Temp
45.4°F
Annual Precip
24.0"
Annual Snowfall
49.4"
Extreme Heat Days
30.9
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Mineral County Weather
A Wet and Variable Mountain Climate
Mineral County averages 45.4°F annually, which is mild for the region but cool nationally. It is remarkably wet for Montana, receiving 24.0 inches of precipitation, well above the arid state norm.
One of Montana's Wettest Counties
The 24.0 inches of annual precipitation here far exceeds the Montana average of 15.4 inches. It is also one of the warmer counties in the state, averaging nearly two degrees above the state median.
Much Rainier Than Missoula County
Mineral County receives 6 inches more precipitation annually than neighboring Missoula. It also faces more extreme heat, with 31 days over 90°F compared to Missoula's 18 days.
Hot Summers and Very Damp Winters
The county sees a full month of extreme heat days, with July averaging 66.9°F. Winter is mild but wet, with 49.4 inches of snow and a January average of 26.8°F.
Manage Moisture and Summer Heat
With 24 inches of precipitation, moisture control and drainage are critical for home maintenance. Residents also need dual-purpose climate control to handle the 31 days of extreme summer heat.
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.