Thayer is located in Illinois. Thayer, Illinois has a population of 577. Thayer is less family-centric than the surrounding county with 11.52% of the households containing married families with children. The county average for households married with children is 25.59%.
The median household income in Thayer, Illinois is $52,778. The median household income for the surrounding county is $66,149 compared to the national median of $69,021. The median age of people living in Thayer is 44.3 years.
The average high temperature in July is 86.1 degrees, with an average low temperature in January of 19 degrees. The average rainfall is approximately 38 inches per year, with 18.2 inches of snow per year.
