Augusta is located in St. charles county Missouri with a geographic area of 0.9 square miles. The total population in Augusta is 284 with 46.8% male and 53.2% female. Children under age 5 represent 2.5% of the population, under age 18 equal 19.7% of the population and over age 65 is 27.5% of the population. The median household income is $80,000, per capita income is $40,069. There are a total of 126 housing units with 87.3% owner occupied. Education includes 23.8% of residents that are high school graduates and 28.6% with a bachelor's degree or higher. The average temperature in Augusta in the summer is 77 degrees, and in the winter 32 degrees.