Somonauk is located in Illinois. Somonauk, Illinois has a population of 1,904. Somonauk is more family-centric than the surrounding county with 31% households with children. The county percentage for households with children is 29%.
The median household income in Somonauk, Illinois is $68,939. The median household income for the surrounding county is $64,842 compared to the national median of $66,222. The median age of people living in Somonauk is 39.6 years.
The average high temperature in July is 83.6 degrees, with an average low temperature in January of 10.3 degrees. The annual precipitation is 37.36.