Average wind speed in Mercer Island (WA)
The mean monthly wind speed over the year in Mercer Island (Washington State), the United States of America (meters per second).
The average annual wind speed spans from 4 m/s in February, April, May, June, July, August, September, October, November and December to 5 m/s in January and March.
Forecast for Mercer Island (WA)
broken clouds and rain
overcast and heavy rain
broken clouds and rain