Cottonwood Lake Weather Forecast

    • 27
    • 41

    Chance Snow

    • 26
    • 55

    Mostly Cloudy

    • 27
    • 44

    Chance Snow

    • 18
    • 61

    Slight Chance Rain/Snow

    • 16
    • 31

    Partly Sunny

    • 23
    • 43

    Mostly Sunny

Today 22 Mar McHenry

Mostly cloudy. A chance of snow in the afternoon. Highs around 40. Northwest Winds 5 to 10 Mph. Chance of snow 30 percent.

Tonight 22 Mar McHenry

Decreasing Clouds. Lows in the mid 20s. Southeast Winds 5 to 10 Mph.

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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

    24.2 °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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