Great Lakes, Illinois — City Overview

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Living in Great Lakes, summers are warm, peaking at 81.1°F in Jul, while winters are cold — Feb lows average 17.9°F. At 6036 heating degree days per year, winter energy bills are significant. The area receives 40.3 inches of rainfall per year. Within 5 miles: 86 parks, 30 dining spots and 14 schools. For hospital care, the nearest facility is in a neighboring city. Air quality is Good — avg AQI 40 over the past week.

View Great Lakes city guide

Updated October 12, 2026.

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