Crystal Lake Weather Forecast

    • 22
    • 35

    Mostly Cloudy

    • 30
    • 37

    Cloudy

    • 34
    • 39

    Cloudy

    • 32
    • 43

    Mostly Cloudy

    • 11
    • 43

    Mostly Cloudy

    • 4
    • 18

    Partly Sunny

Today 23 Dec Hancock

Mostly sunny. Highs in the mid 30s. North Winds 5 to 10 Mph.

Tonight 23 Dec Hancock

Patchy fog in the evening. Mostly cloudy. Lows in the lower 20s. Northeast Winds around 5 Mph, becoming southeast after midnight.

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Crystal Lake Temperature Statistics

December Temperature

Forest City Municipal Airport (8.1 miles)

  • Lowest 4 December, 2025

    -14.8 °F

  • Average December

    17.6 °F

  • Highest 16 December, 2025

    39.2 °F

Climate (2020–Present)

Forest City Municipal Airport (8.1 miles)

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  • Average Low 2020–2025

    36.6 °F

  • Average 2020–2025

    47.2 °F

  • Average High 2020–2025

    57.3 °F
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