Average humidity in Issaquah (WA)
The mean monthly relative humidity over the year in Issaquah (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%.
Forecast for Issaquah (WA)
broken clouds and chance of slight rain
overcast and heavy rain
overcast and heavy rain