Powell County Climate
Powell County, Montana
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
39.8°F
Annual Precip
15.2"
Annual Snowfall
—
Extreme Heat Days
10
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
4b
Minimum winter temperature range for plant survival
1,102
Limited to cold-tolerant varieties
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Powell County
Climate Verdict
Powell County has a cold, with an average annual temperature of 39.8°F, semi-arid conditions with only 15.2 inches of annual precipitation, rare extreme heat with only 9.899999999999999 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 20.8°F. summers are pleasantly cool with July averaging 62.1°F. The 41°F seasonal variation provides noticeable but manageable change. December is typically the coldest month and July the warmest.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Powell County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Powell County is 3.8°F cooler than the Montana statewide average of 43.7°F.
Climate Profile
About Powell County Weather
Colder Than the National Average
A 39.8°F average temperature puts Powell County nearly 15 degrees below the national median. This is a cold, high-elevation climate typical of the continental divide.
Among Montana's Coldest Counties
Powell is significantly colder than the 43.7°F Montana average. It ranks as one of the state's chilliest jurisdictions.
A Cooler Mountain Landscape
While specific snowfall data is unavailable, the 15.2 inches of precipitation matches the state average. July temperatures are much lower at 62.1°F than the nearby eastern plains.
Short, Mild Summers
Summer heat is rare with only 10 days hitting 90°F and a seasonal average of 59.2°F. Winters are cold, averaging 21.1°F with January lows dipping to 20.8°F.
Insulating for Sub-40 Temps
High-performance home insulation is vital for the sub-40°F annual average. Cooling needs are minimal, as the 62.1°F July average is naturally refreshing.
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.