Sweetwater County Climate
Sweetwater County, Wyoming
Avg Annual Temp
42.9°F
Annual Precip
8.5"
Annual Snowfall
38.8"
Extreme Heat Days
15.157142857142858
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Sweetwater County Weather
High Desert Living in Sweetwater
Sweetwater County averages 42.9°F annually, trailing the national median by roughly 11 degrees. It operates as a classic high-altitude desert environment.
Arid and Average
The county’s average temperature sits just below the Wyoming state average of 43.8°F. With only 8.5 inches of annual precipitation, it is much drier than the 13.9-inch state average.
Drier Than the High Peaks
Sweetwater receives less than half the precipitation of neighboring Teton County. Its 38.8 inches of snowfall is also relatively low for the region's high elevation.
Dry Heat and Moderate Snow
July brings 15 days of temperatures above 90°F, while January temperatures dip to an average of 19.7°F. The 64.9°F summer average makes for warm, dry afternoons.
Manage the High Desert Dryness
Water conservation and skin protection are vital in this arid climate. While snow is moderate at 38.8 inches, residents must prepare for winter lows that average 21.1°F.
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.