Chester, Illinois — City Overview

Living in Chester, summers are hot, with Jul highs around 89.0°F, while winters are chilly, with Feb lows around 26.9°F. Winter heating is a real budget factor — 3943 degree days means 4-5 months of meaningful energy bills. The area receives 45.5 inches of rainfall per year. Median household income: $68,826. With a 20.1% poverty rate and 69.5% homeownership, the community reflects a stable residential mix. Air quality is Good — avg AQI 46 over the past week.

View Chester city guide

Updated September 11, 2026.

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