Grayslake Weather Forecast

    • 74
    • 83

    Rain Showers

    • 77
    • 94

    Mostly Sunny

    • 76
    • 95

    Sunny

    • 73
    • 96

    Chance Thunderstorms

    • 64
    • 88

    Chance Thunderstorms

    • 66
    • 83

    Thunderstorms Likely

Today 20 Jun Lake

Mostly cloudy through mid Afternoon, then clearing. Isolated Showers through mid Morning, then scattered Showers late in the morning. Isolated Showers early to mid afternoon. Highs in the lower 80s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of precipitation 30 percent.

Tonight 20 Jun Lake

Mostly clear. Lows in the lower 70s. South Winds 10 to 15 Mph. Gusts up to 25 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grayslake Temperature Statistics

June Temperature

Chicago/Waukegan Regional Airport (10.6 miles)

  • Lowest 1 June, 2025

    38.6 °F

  • Average June

    65.7 °F

  • Highest 17 June, 2025

    93 °F

Climate (2020–Present)

Chicago/Waukegan Regional Airport (10.6 miles)

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  • Average Low 2020–2025

    42.2 °F

  • Average 2020–2025

    50.9 °F

  • Average High 2020–2025

    59.4 °F
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