Cottonwood Lake Weather Forecast

    • 2
    • 10

    Snow Likely

    • 19
    • 35

    Mostly Cloudy

    • 2
    • 38

    Rain/Snow

    • -3
    • 13

    Chance Snow

    • -15
    • 9

    Slight Chance Snow

    • -16
    • -3

    Cold

Today 7 Dec McHenry

Cloudy. A chance of snow late in the Morning, then snow in the afternoon. Snow accumulation around an inch. Highs 5 to 10 above. Southeast Winds 10 to 15 Mph. Wind Chills around 20 below.

Tonight 7 Dec McHenry

Mostly cloudy. A chance of snow in the evening. Lows zero to 5 above. Temperature rising after midnight. South Winds 5 to 10 Mph. Chance of snow 30 percent.

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Cottonwood Lake Temperature Statistics

December Temperature

Harvey Municipal Airport (34.8 miles)

  • Lowest 3 December, 2025

    -11.2 °F

  • Average December

    12.5 °F

  • Highest 2 December, 2025

    33.8 °F

Climate (2020–Present)

Harvey Municipal Airport (34.8 miles)

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  • Average Low 2020–2025

    30.4 °F

  • Average 2020–2025

    41.4 °F

  • Average High 2020–2025

    52.1 °F
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