Mattawa is located in Washington. Mattawa, Washington 99349has a population of 4,841. Mattawa 99349 is more family-centric than the surrounding county with 60% households with children. The county percentage for households with children is 35%.
The median household income in Mattawa, Washington 99349 is $50,211. The median household income for the surrounding county is $59,938 compared to the national median of $66,222. The median age of people living in Mattawa 99349 is 28.7 years.
The average high temperature in July is 90.99 degrees, with an average low temperature in January of 24.31 degrees. The annual precipitation is 7.88.