Crystal Lake Weather Forecast

    • 23
    • 33

    Mostly Cloudy

    • 28
    • 35

    Becoming Sunny

    • 19
    • 35

    Mostly Sunny

    • 24
    • 35

    Mostly Sunny

    • 30
    • 42

    Mostly Sunny

    • 34
    • 43

    Mostly Cloudy

    • 32
    • 45

    Mostly Cloudy

Today 10 Dec McHenry

Cloudy. Nearly steady Temperatures in the lower 30s. Northwest Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

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Crystal Lake Temperature Statistics

December Temperature

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

  • Lowest 5 December, 2023

    32 °F

  • Average December

    40.7 °F

  • Highest 8 December, 2023

    55.9 °F

Climate (2018–Present)

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

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  • Average Low 2018–2023

    44.2 °F

  • Average 2018–2023

    52.6 °F

  • Average High 2018–2023

    60.9 °F
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