Jerseyville, Illinois — City Overview

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Living in Jerseyville, summers are hot, with Jul highs around 86.2°F, while winters are cold — Feb lows average 22.7°F. Winter heating is a real budget factor — 4599 degree days means 4-5 months of meaningful energy bills. The area receives 50.3 inches of rainfall per year. Median household income: $65,736. With a 8.9% poverty rate and 67.6% homeownership, the community reflects a stable residential mix. Air quality is Good — avg AQI 40 over the past week.

View Jerseyville city guide

Updated October 16, 2026.

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