Teton County Climate
Teton County, Idaho
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
40.8°F
Annual Precip
19.2"
Annual Snowfall
—
Extreme Heat Days
1
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
1,322
Limited to cold-tolerant varieties
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 40.8°F annually, semi-arid conditions with only 19.2 inches of annual precipitation, rare extreme heat with only 1.4 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 19.3°F. summers are pleasantly cool with July averaging 63.9°F. The 45°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Teton County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Teton County is 5.7°F cooler than the Idaho statewide average of 46.5°F, it is somewhat wetter than average for Idaho, the county experiences 28.79498418248419 fewer extreme heat days than the state average.
Climate Profile
About Teton County Weather
High Altitude Mountain Living
Teton County averages a chilly 40.8°F annually, sitting 13 degrees below the national median. This high-altitude climate is significantly cooler than the typical American county.
Among Idaho's Coldest Regions
With an annual average of 40.8°F, Teton ranks well below the Idaho state average of 46.5°F. It remains one of the coldest pockets in the state throughout the year.
Wetter and Cooler Than Peers
The county receives 19.2 inches of precipitation, outpacing the Idaho average of 17.0 inches. It maintains a cooler profile than many neighboring agricultural counties to the west.
Mild Summers and Harsh Winters
July averages a comfortable 63.9°F with only one day per year reaching 90°F. However, winters are intense with a December to February average of just 20.5°F.
Prepare for the Long Freeze
Residents need high-performance heating systems to combat January averages of 19.3°F. While specific local snowfall data is unavailable, neighboring mountain peaks require heavy-duty winter gear.
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.