McLean is located in Illinois. McLean, Illinois has a population of 630. McLean is less family-centric than the surrounding county with 20% households with children. The county percentage for households with children is 28%.
The median household income in McLean, Illinois is $70,259. The median household income for the surrounding county is $70,782 compared to the national median of $66,222. The median age of people living in McLean is 43.8 years.
The average high temperature in July is 85.6 degrees, with an average low temperature in January of 13.7 degrees. The annual precipitation is 37.07.