San Juan Island is located in Washington. San Juan Island, Washington has a population of1,271.
The median household income in San Juan Island, Washington is $61,791. The median household income for the surrounding county is $69,512 compared to the national median of $66,222. The median age of people living in San Juan Island is 44.7 years.
The average high temperature in July is 69.8 degrees, with an average low temperature in January of 33.7 degrees. The annual precipitation is 28.16.