Mount washington is located in Berkshire county Massachusetts with a geographic area of square miles. The total population in Mount washington is 136 with 52.9% male and 47.1% female. Children under age 5 represent 0.7% of the population, under age 18 equal 0.7% of the population and over age 65 is 39.0% of the population. The median household income is $79,583, per capita income is $39,913. There are a total of 65 housing units with 96.9% owner occupied. Education includes 24.6% of residents that are high school graduates and 47.7% with a bachelor's degree or higher. The average temperature in Mount washington in the summer is 70 degrees, and in the winter 30 degrees.