Adams County Climate
Adams County, Washington
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
49.8°F
Annual Precip
11.4"
Annual Snowfall
15.1"
Extreme Heat Days
33
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7a
Minimum winter temperature range for plant survival
2,418
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Adams County
Climate Verdict
Adams County has a cool, averaging 49.8°F annually, arid conditions receiving just 11.4 inches of precipitation annually, occasional hot days — 33.400000000000006 per year above 90°F, light snow averaging 15.1 inches per year. 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 71.0°F. The 40°F seasonal variation provides noticeable but manageable change. December is typically the coldest month and July the warmest.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Adams County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Adams County closely matches the Washington statewide average temperature of 49.9°F, it is also noticeably drier, receiving 27.1 inches less precipitation than the state average, the county experiences 15.407232947232956 more extreme heat days than the state average.
Climate Profile
About Adams County Weather
Adams County mirrors national temperature trends
With an annual average of 49.8°F, Adams County sits slightly below the national median for temperature. Its semi-arid climate receives just 11.4 inches of precipitation, making it significantly drier than most American counties.
A dry outlier in Washington state
The county's average temperature nearly matches the state average of 49.9°F. However, its 11.4 inches of rainfall is a fraction of the 38.5 inches Washington typically sees annually.
Warmer and drier than northern neighbors
Adams County experiences more extreme heat than nearby regions, recording 33 days over 90°F annually. This makes it significantly warmer during the summer than neighbors like Chelan to the northwest.
Distinct seasons with hot, dry summers
Summers are intense with July averages hitting 71.0°F, while winters remain chilly at 32.2°F. The county sees a modest 15.1 inches of snowfall, concentrated in the brief winter months.
Prepare for heat and dust
High-efficiency cooling is a priority here given the 33 days of extreme heat each year. Residents should also invest in dust mitigation for the home due to the low annual precipitation.
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.