Teton County Climate
Teton County, Idaho
Avg Annual Temp
40.8°F
Annual Precip
19.2"
Annual Snowfall
—
Extreme Heat Days
1.4
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.