McHenry is located in Illinois. McHenry, Illinois has a population of 26,730. McHenry is less family-centric than the surrounding county with 35.75% of the households containing married families with children. The county average for households married with children is 37.26%.
The median household income in McHenry, Illinois is $68,913. The median household income for the surrounding county is $82,230 compared to the national median of $57,652. The median age of people living in McHenry is 39.8 years.
The average high temperature in July is 81.7 degrees, with an average low temperature in January of 11.9 degrees. The average rainfall is approximately 36.4 inches per year, with 34.3 inches of snow per year.
