Clark County Climate
Clark County, Washington
Avg Annual Temp
52.0°F
Annual Precip
44.0"
Annual Snowfall
1.1"
Extreme Heat Days
11.7
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.