Arnold is located in Missouri. Arnold, Missouri has a population of 20,808. Arnold is more family-centric than the surrounding county with 30.92% of the households containing married families with children. The county average for households married with children is 30.74%.
The median household income in Arnold, Missouri is $63,755. The median household income for the surrounding county is $71,285 compared to the national median of $69,021. The median age of people living in Arnold is 42.2 years.
The average high temperature in July is 88.3 degrees, with an average low temperature in January of 22.6 degrees. The average rainfall is approximately 43.9 inches per year, with 12.3 inches of snow per year.
