Teton County Climate
Teton County, Montana
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
43.2°F
Annual Precip
12.1"
Annual Snowfall
47.5"
Extreme Heat Days
9
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
4b
Minimum winter temperature range for plant survival
1,508
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Teton County
Climate Verdict
Teton County has a cool, averaging 43.2°F annually, arid conditions receiving just 12.1 inches of precipitation annually, rare extreme heat with only 9.066666666666666 days above 90°F annually, moderate snowfall of 47.5 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 24.8°F. summers are pleasantly cool with July averaging 64.9°F. The 40°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
Teton County closely matches the Montana statewide average temperature of 43.7°F, it is somewhat drier than average for Montana.
Climate Profile
About Teton County Weather
A dry, high-latitude climate
Teton County records an average annual temperature of 43.2°F, placing it well below the national median for warmth. With only 12.1 inches of annual precipitation, the region is significantly drier than the average American county.
Slightly cooler than the state
At 43.2°F, Teton County sits just below the Montana state average of 43.7°F. Its 47.5 inches of annual snowfall is typical for the Rocky Mountain Front, providing steady moisture despite low overall rainfall.
Mild summers compared to the plains
Teton avoids the intense heat seen further east, recording only 9 days above 90°F per year. This is significantly fewer heat events than neighbor Toole County, which sees nearly 60% more extreme heat days.
Consistently cool across seasons
Summer averages stay cool at 62.0°F, while winters are cold with a December through February average of 25.4°F. January is the coldest stretch, with temperatures averaging 24.8°F.
Focus on moisture and insulation
The dry air and 12.1 inches of precipitation mean xeriscaping is a smart choice for local landscaping. Given the 47.5 inches of snow and cold winters, ensuring home insulation is up to modern standards will keep heating costs manageable.
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.