Crystal Lake Weather Forecast

    • 31
    • 38

    Rain

    • 1
    • 34

    Chance Snow

    • 20
    • 28

    Mostly Cloudy

    • 7
    • 30

    Partly Sunny

    • 15
    • 23

    Mostly Cloudy

    • 25
    • 32

    Mostly Cloudy

Today 17 Dec Hancock

Partly sunny. Highs in the upper 30s. Southwest Winds 5 to 10 Mph, increasing to south 15 to 20 Mph with Gusts up to 30 Mph this afternoon.

Tonight 17 Dec Hancock

Cloudy. A chance of rain in the Evening, then rain after midnight. Breezy with Lows in the lower 30s. South Winds 20 to 25 Mph, becoming southwest after midnight. Chance of rain 80 percent.

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  • Temperature Real-Time

Crystal Lake Temperature Statistics

December Temperature

Forest City Municipal Airport (8.1 miles)

  • Lowest 4 December, 2025

    -14.8 °F

  • Average December

    15 °F

  • Highest 9 December, 2025

    37.4 °F

Climate (2020–Present)

Forest City Municipal Airport (8.1 miles)

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  • Average Low 2020–2025

    36.7 °F

  • Average 2020–2025

    47.2 °F

  • Average High 2020–2025

    57.3 °F
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