Dewey is located in Illinois. Dewey, Illinois 61840has a population of 32. Dewey 61840 is less family-centric than the surrounding county with 22% households with children. The county percentage for households with children is 23%.
The median household income in Dewey, Illinois 61840 is $70,000. The median household income for the surrounding county is $56,059 compared to the national median of $66,222. The median age of people living in Dewey 61840 is 48.2 years.
The average high temperature in July is 86.11 degrees, with an average low temperature in January of 13.75 degrees. The annual precipitation is 37.55.