Cottonwood Lake Weather Forecast

    • 15
    • 29

    Snow Likely

    • 28
    • 38

    Partly Sunny

    • 28
    • 56

    Partly Sunny

    • 27
    • 55

    Mostly Cloudy

    • 30
    • 51

    Slight Chance Rain/Snow

    • 24
    • 48

    Slight Chance Rain/Snow

    • 26
    • 42

    Chance Snow

Today 26 Mar McHenry

Mostly sunny. Colder. Highs in the upper 20s. Northeast Winds around 5 Mph.

Tonight 26 Mar McHenry

Snow likely. Snow accumulation around an inch. Lows around 15. North Winds around 5 Mph, increasing to northwest around 15 Mph after midnight. Chance of snow 60 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

    27.2 °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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