Dewey is located in Illinois. Dewey, Illinois 61840has a population of 913. Dewey 61840 is less family-centric than the surrounding county with 22% of the households containing married families with children. The county average for households married with children is 30.62%.
The median household income in Dewey, Illinois 61840 is $61,486. The median household income for the surrounding county is $49,586 compared to the national median of $57,652. The median age of people living in Dewey 61840 is 47.4 years.
The average high temperature in July is 86.7 degrees, with an average low temperature in January of 16.1 degrees. The average rainfall is approximately 39.5 inches per year, with 17.3 inches of snow per year.
