Gillespie, Illinois — City Overview

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Living in Gillespie, summers are hot, with Jul highs around 86.0°F, while winters are cold — Feb lows average 23.5°F. Winter heating is a real budget factor — 4561 degree days means 4-5 months of meaningful energy bills. The area receives 49.9 inches of rainfall per year. Median household income: $65,000. With a 1.4% poverty rate and 89.7% homeownership, the community reflects a stable residential mix. Nearby cities: Mount Olive (6mi SE), Staunton (8mi S), Litchfield (9mi E). Air quality is Good — avg AQI 35 over the past week.

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Updated October 09, 2026.

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