Waukegan Regional Airport Weather Forecast

    • 61
    • 75

    Decreasing Clouds

    • 62
    • 78

    Mostly Sunny

    • 63
    • 79

    Chance Rain Showers

    • 59
    • 79

    Slight Chance Thunderstorms

    • 58
    • 74

    Partly Sunny

    • 60
    • 74

    Partly Sunny

Today 19 Aug Lake

Mostly cloudy. Patchy fog early in the morning. A slight chance of Showers early in the afternoon. Highs in the upper 70s Inland, but only in the mid 70s near the lake. Northeast Winds 5 to 10 Mph. Chance of precipitation 20 percent.

Tonight 19 Aug Lake

Partly cloudy. Lows around 60. North Winds around 5 Mph.

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Waukegan Regional Airport Temperature Statistics

August Temperature

Chicago/Waukegan Regional Airport (0 miles)

  • Lowest 9 August, 2026

    58.6 °F

  • Average August

    72.3 °F

  • Highest 16 August, 2026

    85.6 °F

Climate (2021–2026)

Chicago/Waukegan Regional Airport (0 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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