Cottonwood Lake Weather Forecast

    • 24
    • 47

    Chance Snow

    • 18
    • 34

    Partly Sunny

    • 29
    • 39

    Mostly Cloudy

    • 32
    • 46

    Snow Likely

    • 27
    • 40

    Snow Likely

    • 23
    • 37

    Slight Chance Snow

Today 30 Mar McHenry

Mostly cloudy. A chance of freezing rain and snow in the Morning, then a chance of rain in the afternoon. Highs in the lower 40s. East Winds around 15 Mph. Chance of precipitation 40 percent.

Tonight 30 Mar McHenry

Mostly cloudy. A chance of rain possibly mixed with snow in the Evening, then a slight chance of snow after midnight. Little or no new snow accumulation. Lows in the lower 20s. Northeast Winds around 15 Mph, becoming northwest after midnight. Chance of precipitation 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cottonwood Lake Temperature Statistics

March Temperature

Harvey Municipal Airport (34.8 miles)

  • Lowest 16 March, 2026

    -9.4 °F

  • Average March

    27.3 °F

  • Highest 19 March, 2026

    69.8 °F

Climate (2021–Present)

Harvey Municipal Airport (34.8 miles)

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  • Average Low 2021–2026

    30.3 °F

  • Average 2021–2026

    41.2 °F

  • Average High 2021–2026

    52 °F
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