St Peter is located in Illinois. St Peter, Illinois has a population of 370. St Peter is more family-centric than the surrounding county with 30.85% of the households containing married families with children. The county average for households married with children is 27.96%.
The median household income in St Peter, Illinois is $56,000. The median household income for the surrounding county is $47,744 compared to the national median of $69,021. The median age of people living in St Peter is 37.8 years.
The average high temperature in July is 87.6 degrees, with an average low temperature in January of 21.1 degrees. The average rainfall is approximately 42.4 inches per year, with 11.8 inches of snow per year.
