Cottonwood Lake Weather Forecast

    • 1
    • 26

    Snow Likely

    • -3
    • 13

    Partly Sunny

    • 9
    • 19

    Partly Sunny

    • 31
    • 44

    Chance Wintry Mix

    • 38
    • 59

    Partly Sunny

    • 37
    • 59

    Mostly Cloudy

    • 36
    • 64

    Mostly Cloudy

Today 14 Mar McHenry

Mostly cloudy with a 30 percent chance of snow. Highs in the lower 20s. Northeast Winds around 15 Mph with Gusts up to 25 Mph.

Tonight 14 Mar McHenry

Mostly cloudy. A chance of snow in the evening. Lows near zero. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of snow 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cottonwood Lake Temperature Statistics

March Temperature

Harvey Municipal Airport (34.8 miles)

  • Lowest 1 March, 2026

    -0.4 °F

  • Average March

    25 °F

  • Highest 8 March, 2026

    60.8 °F

Climate (2021–Present)

Harvey Municipal Airport (34.8 miles)

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  • Average Low 2021–2026

    30.3 °F

  • Average 2021–2026

    41.3 °F

  • Average High 2021–2026

    52.1 °F
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