Cottonwood Lake Weather Forecast

    • 15
    • 23

    Slight Chance Freezing Rain

    • 20
    • 32

    Mostly Cloudy

    • -1
    • 28

    Chance Snow

    • -9
    • 6

    Blustery

    • 12
    • 23

    Mostly Cloudy

    • 5
    • 33

    Chance Snow

    • -6
    • 14

    Slight Chance Snow

Today 25 Dec McHenry

Cloudy with a 30 percent chance of freezing rain. Highs in the lower 20s. Northwest Winds around 5 Mph.

Tonight 25 Dec McHenry

Cloudy. Patchy fog after midnight. Lows 10 to 15. West Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cottonwood Lake Temperature Statistics

December Temperature

Harvey Municipal Airport (34.8 miles)

  • Lowest 7 December, 2025

    -18.4 °F

  • Average December

    12.6 °F

  • Highest 16 December, 2025

    44.6 °F

Climate (2020–Present)

Harvey Municipal Airport (34.8 miles)

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  • Average Low 2020–2025

    30.3 °F

  • Average 2020–2025

    41.3 °F

  • Average High 2020–2025

    52 °F
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