Average humidity in Seattle (WA)
The mean monthly relative humidity over the year in Seattle (Washington State), the United States of America.
- On average, December is the most humid month, at 80.0%.
- On average, July is the least humid month, at 65.0%.
- The average annual percentage of humidity is 73%.
Weather Forecasts for Seattle (WA)
overcast and heavy rain
broken clouds and rain
overcast and rain