Sweetwater County Climate
Sweetwater County, Wyoming
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
42.9°F
Annual Precip
8.5"
Annual Snowfall
38.8"
Extreme Heat Days
15
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5b
Minimum winter temperature range for plant survival
1,779
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Sweetwater County
Climate Verdict
Sweetwater County has a cool, averaging 42.9°F annually, arid conditions receiving just 8.5 inches of precipitation annually, rare extreme heat with only 15.157142857142858 days above 90°F annually, moderate snowfall of 38.8 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 19.7°F. summers are pleasantly cool with July averaging 68.1°F. The 48°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Sweetwater County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Sweetwater County closely matches the Wyoming statewide average temperature of 43.8°F, it is also noticeably drier, receiving 5.3 inches less precipitation than the state average.
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 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.