Harmon, Illinois — City Overview

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Living in Harmon, summers are warm, peaking at 84.5°F in Jul, while winters are cold — Jan lows average 15.4°F. Winter heating is a real budget factor — 5863 degree days means 4-5 months of meaningful energy bills. With 39.8 inches annually, the climate is relatively dry. Median household income: $54,500. With a 15.4% poverty rate and 93.8% homeownership, the community reflects a stable residential mix. Air quality is Good — avg AQI 35 over the past week.

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Updated October 13, 2026.

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