McHenry is located in Illinois. McHenry, Illinois has a population of 27,237. McHenry is less family-centric than the surrounding county with 29.27% of the households containing married families with children. The county average for households married with children is 33.95%.
The median household income in McHenry, Illinois is $76,858. The median household income for the surrounding county is $93,801 compared to the national median of $69,021. The median age of people living in McHenry is 42.2 years.
The average high temperature in July is 81.9 degrees, with an average low temperature in January of 12.9 degrees. The average rainfall is approximately 36.1 inches per year, with 37.4 inches of snow per year.
