Cottonwood Lake Weather Forecast

    • 21
    • 63

    Chance Rain

    • 15
    • 29

    Slight Chance Snow

    • 26
    • 39

    Mostly Sunny

    • 35
    • 53

    Mostly Cloudy

    • 28
    • 58

    Partly Sunny

    • 33
    • 50

    Mostly Cloudy

    • 27
    • 53

    Mostly Cloudy

Today 25 Mar McHenry

Mostly cloudy. Highs in the upper 40s. East Winds around 10 Mph.

Tonight 25 Mar McHenry

A slight chance of freezing rain in the evening. Mostly cloudy with a slight chance of snow. Lows 15 to 20. Northeast Winds 10 to 15 Mph. Chance of precipitation 20 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

    26.8 °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

    41.3 °F

  • Average High 2021–2026

    52 °F
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