Grafton is located in Illinois. Grafton, Illinois has a population of 630. Grafton is less family-centric than the surrounding county with 24% households with children. The county percentage for households with children is 27%.
The median household income in Grafton, Illinois is $55,294. The median household income for the surrounding county is $63,808 compared to the national median of $66,222. The median age of people living in Grafton is 49.8 years.
The average high temperature in July is 87.5 degrees, with an average low temperature in January of 17.3 degrees. The annual precipitation is 38.24.