Hennepin, Illinois — City Overview

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Living in Hennepin, summers are warm, peaking at 84.5°F in Jul, while winters are cold — Feb lows average 17.9°F. Winter heating is a real budget factor — 5541 degree days means 4-5 months of meaningful energy bills. The area receives 40.4 inches of rainfall per year. Median household income: $77,500. With a 4.2% poverty rate and 79.1% homeownership, the community reflects a stable residential mix. Air quality is Good — avg AQI 34 over the past week.

View Hennepin city guide

Updated October 13, 2026.

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