Harrisburg, Illinois — City Overview

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Living in Harrisburg, summers are hot, with Jul highs around 88.7°F, while winters are chilly, with Feb lows around 28.4°F. Winter heating is a real budget factor — 3762 degree days means 4-5 months of meaningful energy bills. The area receives 46.8 inches of rainfall per year. Median household income: $38,937. With a 24.1% poverty rate and 62.0% homeownership, the community reflects a stable residential mix. Air quality is Good — avg AQI 37 over the past week.

View Harrisburg city guide

Updated October 13, 2026.

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