Chillicothe, Illinois — City Overview

Living in Chillicothe, summers are warm, peaking at 84.6°F in Jul, while winters are cold — Feb lows average 18.4°F. Winter heating is a real budget factor — 5421 degree days means 4-5 months of meaningful energy bills. The area receives 40.3 inches of rainfall per year. Median household income: $59,161. With a 19.2% poverty rate and 79.7% homeownership, the community reflects a stable residential mix. Air quality is Good — avg AQI 42 over the past week.

View Chillicothe city guide

Updated September 11, 2026.

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