Sublette County Climate
Sublette County, Wyoming
Avg Annual Temp
35.9°F
Annual Precip
12.1"
Annual Snowfall
80.8"
Extreme Heat Days
1.85
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Sublette County Weather
Among the Nation's Coldest Spots
Sublette County averages a chilly 35.9°F annually, nearly 18 degrees colder than the national median. This high-altitude climate represents one of the most frigid environments in the continental U.S.
One of Wyoming's Iceboxes
The county stays significantly colder than the Wyoming state average of 43.8°F. It receives 12.1 inches of precipitation, which is slightly below the 13.9-inch state norm.
Frigid Even for the Rockies
Sublette is colder than Sweetwater County to the south, where temperatures average a much milder 42.9°F. It shares a high-snowfall profile with its western neighbor, Teton.
Summer Heat is a Rarity
The county sees only 2 days per year above 90°F, with July temperatures averaging just 60.1°F. Winters are brutal, averaging 13.4°F with 80.8 inches of annual snow.
Winter Gear is Mandatory
Heavy-duty winter insulation and engine block heaters are standard requirements for life here. Air conditioning is rarely necessary given the cool 57.2°F summer average.
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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.