McLean is located in Illinois. McLean, Illinois has a population of 736. McLean is less family-centric than the surrounding county with 22.17% of the households containing married families with children. The county average for households married with children is 33.65%.
The median household income in McLean, Illinois is $82,500. The median household income for the surrounding county is $70,339 compared to the national median of $69,021. The median age of people living in McLean is 38.1 years.
The average high temperature in July is 86 degrees, with an average low temperature in January of 16 degrees. The average rainfall is approximately 39.3 inches per year, with 22.4 inches of snow per year.