Chehalis is located in Lewis county Washington with a geographic area of 5.8 square miles. The total population in Chehalis is 7,607 with 53.3% male and 46.7% female. Children under age 5 represent 6.6% of the population, under age 18 equal 20.7% of the population and over age 65 is 18.5% of the population. The median household income is $45,195, per capita income is $26,064. There are a total of 3,133 housing units with 46.9% owner occupied. Education includes 29.3% of residents that are high school graduates and 19.8% with a bachelor's degree or higher. The average temperature in Chehalis in the summer is 65 degrees, and in the winter 42 degrees.