Crystal Lake Weather Forecast

    • 64
    • 84

    Mostly Cloudy

    • 64
    • 79

    Rain Showers

    • 60
    • 73

    Rain Showers

    • 59
    • 78

    Mostly Sunny

    • 62
    • 82

    Mostly Sunny

    • 65
    • 85

    Partly Sunny

Today 30 Jul McHenry

Mostly sunny late in the Morning, then becoming partly cloudy. Highs in the mid 80s. Southwest Winds around 5 Mph.

Tonight 30 Jul McHenry

Mostly cloudy. Lows in the lower 60s. South Winds around 5 Mph in the Evening, becoming light and variable.

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Crystal Lake Temperature Statistics

July Temperature

Chicago / Wheeling, Pal-Waukee Airport (22.4 miles)

  • Lowest 23 July, 2026

    54.6 °F

  • Average July

    76.4 °F

  • Highest 14 July, 2026

    97.6 °F

Climate (2021–2026)

Chicago / Wheeling, Pal-Waukee Airport (22.4 miles)

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  • Average Low 2021–2026

    44 °F

  • Average 2021–2026

    52.9 °F

  • Average High 2021–2026

    61.6 °F
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