The average annual number of rainy or snowy days in Seattle, Washington, is 154 days, based on an online report published by the City of Seattle. The city's annual precipitation is estimated to be around 38.6 inches.
Seattle serves as the county seat in King County in Washington. It forms part of the Northwest region of the United States, bounded by Lake Washington on the east and Puget Sound on the west. The rainiest days in Seattle are during the months of December with 19, November with 18, January with 18, February with 16 and March with 17 days of precipitation. The hottest months are in July and August with a mean high temperature of 75 degrees Fahrenheit and 76 degrees, respectively.