London Mills, Illinois — City Overview

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Living in London Mills, summers are hot, with Jul highs around 85.1°F, while winters are cold — Feb lows average 18.6°F. Winter heating is a real budget factor — 5383 degree days means 4-5 months of meaningful energy bills. With 39.4 inches annually, the climate is relatively dry. Median household income: $50,568. With a 19.4% poverty rate and 80.4% homeownership, the community reflects a stable residential mix. Air quality is Good — avg AQI 45 over the past week.

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Updated October 20, 2026.

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