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Living in Grayslake, summers are warm, peaking at 83.3°F in Jul, while winters are cold — Feb lows average 16.0°F. At 6099 heating degree days per year, winter energy bills are significant. With 39.4 inches annually, the climate is relatively dry. Median household income: $110,662. With a 6.8% poverty rate and 74.5% homeownership, the community reflects a stable residential mix. Nearby cities: Libertyville (6mi SE), Mundelein (6mi SE), Gurnee (7mi E). Air quality is Good — avg AQI 40 over the past week.
Updated October 12, 2026.
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