Grand Coulee is located in Washington. Grand Coulee, Washington 99133has a population of 1,018. Grand Coulee 99133 is less family-centric than the surrounding county with 18% households with children. The county percentage for households with children is 31%.
The median household income in Grand Coulee, Washington 99133 is $43,942. The median household income for the surrounding county is $66,354 compared to the national median of $66,222. The median age of people living in Grand Coulee 99133 is 48.2 years.
The average high temperature in July is 87.01 degrees, with an average low temperature in January of 19.96 degrees. The annual precipitation is 10.52.