Benton County Climate
Benton County, Washington
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
53.9°F
Annual Precip
7.9"
Annual Snowfall
—
Extreme Heat Days
42
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7b
Minimum winter temperature range for plant survival
3,226
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Benton County
Climate Verdict
Benton County has a mild, with an average annual temperature of 53.9°F, arid conditions receiving just 7.9 inches of precipitation annually, occasional hot days — 41.775 per year above 90°F. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 34.8°F. summers are warm — July averages 75.5°F. The 41°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 Benton County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Benton County is 4.0°F warmer than the Washington statewide average of 49.9°F, it is also noticeably drier, receiving 30.6 inches less precipitation than the state average, the county experiences 23.78223294723295 more extreme heat days than the state average.
Climate Profile
About Benton County Weather
One of Washington's warmest, driest spots
Benton County's 53.9°F average temperature is higher than the national median. It is exceptionally dry, receiving only 7.9 inches of rain compared to the much higher national average.
Leading the state in summer heat
The county is significantly warmer than the Washington average of 49.9°F. Its 42 days of extreme heat far exceed what most residents in the state experience.
Hotter and drier than Adams County
Benton averages 53.9°F annually, making it warmer than neighboring Adams County. It also receives nearly four inches less rain per year than its neighbor to the northeast.
Scorching summers and mild winters
July brings an average temperature of 75.5°F, supported by 42 days of heat over 90°F. Winter remains relatively mild for the region, averaging 36.0°F.
Prioritize cooling and water storage
Central air conditioning is essential to handle the six weeks of extreme heat. With only 7.9 inches of rain, supplemental irrigation is necessary for any local gardening or agriculture.
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.