Waukegan Weather Forecast

    • 67
    • 87

    Chance Thunderstorms

    • 63
    • 77

    Partly Sunny

    • 66
    • 78

    Mostly Sunny

    • 69
    • 83

    Chance Thunderstorms

    • 67
    • 81

    Chance Thunderstorms

    • 66
    • 80

    Chance Rain Showers

Today 27 Jul Lake

Mostly cloudy. A chance of Showers and Thunderstorms. Some Thunderstorms may be severe with damaging Winds and large hail. Highs in the upper 80s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of precipitation 50 percent.

Tonight 27 Jul Lake

Partly cloudy in the Evening, then becoming mostly cloudy. A chance of Showers and Thunderstorms early in the evening. Humid with Lows in the mid 60s. West Winds 10 to 15 Mph, becoming north after midnight. Chance of precipitation 40 percent.

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Waukegan Temperature Statistics

July Temperature

Chicago/Waukegan Regional Airport (3.7 miles)

  • Lowest 23 July, 2026

    51.7 °F

  • Average July

    73.9 °F

  • Highest 1 July, 2026

    93.7 °F

Climate (2021–2026)

Chicago/Waukegan Regional Airport (3.7 miles)

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  • Average Low 2021–2026

    42.2 °F

  • Average 2021–2026

    51.1 °F

  • Average High 2021–2026

    59.8 °F
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