Chatham, Illinois — City Overview

Living in Chatham, summers are warm, peaking at 84.9°F in Jul, while winters are cold — Feb lows average 21.8°F. Winter heating is a real budget factor — 4813 degree days means 4-5 months of meaningful energy bills. The area receives 43.0 inches of rainfall per year. Median household income: $104,000. With a 3.9% poverty rate and 79.6% homeownership, the community reflects a stable residential mix. Nearby cities: Auburn (6mi SW), Springfield (9mi NE), Petersburg (24mi NW). Air quality is Good — avg AQI 46 over the past week.

View Chatham city guide

Updated September 05, 2026.

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