Have questions? Interested in touring homes with an agent? We’re here to help!
O'Fallon is located in Saint Charles County, Missouri. There are roughly 68,270 residents, living in 24,322 households. The average temperature for O'Fallon this time of the year is low of 54F and high of 76F. On average, O'Fallon gets about 4.31 inches of precipitation in May. Most residents are home owners (82%), have a post secondary degree (57%) and are married, with kids (31%).