Grafton, Illinois — City Overview

Living in Grafton, summers are hot, with Jul highs around 86.4°F, while winters are cold — Feb lows average 24.1°F. Winter heating is a real budget factor — 4414 degree days means 4-5 months of meaningful energy bills. The area receives 53.6 inches of rainfall per year. Median household income: $89,808. With a 10.2% poverty rate and 87.1% homeownership, the community reflects a stable residential mix. Nearby cities: Jerseyville (12mi NE), Godfrey (13mi E), Saint Charles (13mi S). Air quality is Good — avg AQI 47 over the past week.

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Updated October 12, 2026.

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