Crystal Lake Weather Forecast

    • 17
    • 43

    Chance Wintry Mix

    • 21
    • 34

    Mostly Cloudy

    • 27
    • 49

    Mostly Sunny

    • 28
    • 56

    Mostly Cloudy

    • 25
    • 46

    Slight Chance Rain/Snow

    • 16
    • 44

    Mostly Cloudy

Today 6 Dec Brown

Cloudy with a chance of snow and a slight chance of freezing rain in the Morning, then partly sunny in the afternoon. Little or no snow accumulation. Ice accumulation of less than one tenth of an inch. Highs in the lower 40s. South Winds 15 to 20 Mph, becoming northwest 10 to 15 Mph in the afternoon. Chance of precipitation 40 percent.

Tonight 6 Dec Brown

Mostly cloudy. Lows around 14. North Winds 10 to 15 Mph.

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Crystal Lake Temperature Statistics

December Temperature

Ainsworth Regional Airport (19.3 miles)

  • Lowest 1 December, 2025

    11.3 °F

  • Average December

    25.5 °F

  • Highest 2 December, 2025

    43.2 °F

Climate (2020–Present)

Ainsworth Regional Airport (19.3 miles)

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  • Average Low 2020–2025

    37.8 °F

  • Average 2020–2025

    49.4 °F

  • Average High 2020–2025

    61.8 °F
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