Winchester is located in Lewis county Idaho with a geographic area of 0.2 square miles. The total population in Winchester is 236 with 56.4% male and 43.6% female. Children under age 5 represent 0.8% of the population, under age 18 equal 14.4% of the population and over age 65 is 32.2% of the population. The median household income is $37,500, per capita income is $25,874. There are a total of 110 housing units with 73.6% owner occupied. Education includes 33.6% of residents that are high school graduates and 19.1% with a bachelor's degree or higher. The average temperature in Winchester in the summer is 59 degrees, and in the winter 24 degrees.