Winchester is located in Riverside county California with a geographic area of 8.0 square miles. The total population in Winchester is 2,957 with 59.9% male and 40.1% female. Children under age 5 represent 4.7% of the population, under age 18 equal 22.7% of the population and over age 65 is 18.0% of the population. The median household income is $49,783, per capita income is $18,401. There are a total of 744 housing units with 87.5% owner occupied. Education includes 29.8% of residents that are high school graduates and 5.1% with a bachelor's degree or higher. The average temperature in Winchester in the summer is 76 degrees, and in the winter 43 degrees.