Mineral County Climate
Mineral County, Montana
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
45.4°F
Annual Precip
24.0"
Annual Snowfall
49.4"
Extreme Heat Days
31
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
1,738
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Mineral County
Climate Verdict
Mineral County has a cool, averaging 45.4°F annually, semi-arid conditions with only 24.0 inches of annual precipitation, occasional hot days — 30.900000000000002 per year above 90°F, moderate snowfall of 49.4 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 26.8°F. summers are pleasantly cool with July averaging 66.9°F. The 40°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
Mineral County closely matches the Montana statewide average temperature of 43.7°F, it is also noticeably wetter, receiving 8.6 inches more precipitation than the state average.
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 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.