Owyhee County Climate
Owyhee County, Idaho
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
49.7°F
Annual Precip
10.0"
Annual Snowfall
47.3"
Extreme Heat Days
41
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7a
Minimum winter temperature range for plant survival
2,530
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Owyhee County
Climate Verdict
Owyhee County has a cool, averaging 49.7°F annually, arid conditions receiving just 10.0 inches of precipitation annually, occasional hot days — 41.08571428571429 per year above 90°F, moderate snowfall of 47.3 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 31.0°F. summers are warm — July averages 72.4°F. The 41°F seasonal variation provides noticeable but manageable change. December is typically the coldest month and July the warmest.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
Owyhee County is 3.1°F warmer than the Idaho statewide average of 46.5°F, it is also noticeably drier, receiving 7.0 inches less precipitation than the state average.
Climate Profile
About Owyhee County Weather
America's High Desert Frontier
Owyhee is a vast, dry frontier with a 49.7°F average temperature and only 10 inches of rain. This puts it among the driest counties in the United States.
Idaho's Driest Desert County
It is warmer than the Idaho average of 46.5°F but ranks as the driest county in the state. While rain is scarce, the county catches a robust 47.3 inches of snow annually.
Drier and Snowier than Boise
Owyhee is significantly drier and warmer than its northern neighbor, Ada County. However, its high-desert peaks catch far more snow (47.3 inches) than the nearby Treasure Valley.
Hot Summers, Cold Snowy Winters
Summers are hot with 41 days hitting 90°F or higher. Winters are moderately cold, averaging 32°F, though January nights can be particularly biting in the open desert.
Conserve Water and Drive 4WD
Water conservation is a way of life given the 10-inch annual precipitation limit. High-clearance vehicles are recommended for winter travel to navigate the 47-inch snowfall average.
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.