St Peter is located in Illinois. St Peter, Illinois has a population of 495. St Peter is more family-centric than the surrounding county with 31.58% of the households containing married families with children. The county average for households married with children is 26.2%.
The median household income in St Peter, Illinois is $43,906. The median household income for the surrounding county is $44,541 compared to the national median of $57,652. The median age of people living in St Peter is 36.9 years.
The average high temperature in July is 87.2 degrees, with an average low temperature in January of 21 degrees. The average rainfall is approximately 42 inches per year, with 12.5 inches of snow per year.
