Clear lake is located in Cerro gordo county Iowa with a geographic area of 10.8 square miles. The total population in Clear lake is 7,594 with 46.7% male and 53.3% female. Children under age 5 represent 4.2% of the population, under age 18 equal 17.8% of the population and over age 65 is 26.2% of the population. The median household income is $61,338, per capita income is $42,603. There are a total of 3,429 housing units with 72.6% owner occupied. Education includes 26.2% of residents that are high school graduates and 32.7% with a bachelor's degree or higher. The average temperature in Clear lake in the summer is 70 degrees, and in the winter 23 degrees.