Clark County Climate
Clark County, Washington
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
52.0°F
Annual Precip
44.0"
Annual Snowfall
1.1"
Extreme Heat Days
12
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8b
Minimum winter temperature range for plant survival
2,109
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Clark County
Climate Verdict
Clark County has a mild, with an average annual temperature of 52.0°F, moderately wet with 44.0 inches of annual precipitation, rare extreme heat with only 11.700000000000001 days above 90°F annually, light snow averaging 1.1 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 39.4°F. summers are pleasantly cool with July averaging 66.3°F. The climate is remarkably stable year-round, with only a 27°F difference between January and July. December is typically the coldest month and August the warmest.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Clark County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Clark County closely matches the Washington statewide average temperature of 49.9°F, it is also noticeably wetter, receiving 5.5 inches more precipitation than the state average.
Climate Profile
About Clark County Weather
Mild temperatures and high annual rainfall
Clark County averages 52.0°F, placing it near the national median for temperature. Its 44.0 inches of annual precipitation is well above the national average.
Warmer and wetter than most of Washington
At 52.0°F, the county is warmer than the state average of 49.9°F. Its 44 inches of rain also exceeds the state average of 38.5 inches.
Drier than its northern neighbor, Cowlitz
Clark County receives 44 inches of rain, which is significantly less than the 61.4 inches seen in Cowlitz. Both counties share a similar mild, maritime temperature profile.
Rainy winters and pleasant, temperate summers
July averages a comfortable 66.3°F with 12 days of heat over 90°F. Winters are wet and mild, averaging 40.1°F with only 1.1 inches of snow.
Manage the rain and light heat
Proper drainage and gutter maintenance are vital for the 44-inch rainfall. While summers are generally mild, the 12 days of extreme heat suggest having some cooling options available.
Frequently Asked Questions
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Track your own weather in Clark County
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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.