Cottonwood Lake Weather Forecast

    • 24
    • 46

    Decreasing Clouds

    • 35
    • 49

    Mostly Cloudy

    • 43
    • 55

    Mostly Cloudy

    • 45
    • 61

    Rain Showers Likely

    • 36
    • 55

    Chance Rain Showers

    • 34
    • 53

    Slight Chance Rain Showers

Today 29 Oct McHenry

Partly sunny in the morning then clearing. Highs in the mid 40s. Northwest Winds around 5 Mph.

Tonight 29 Oct McHenry

Partly cloudy. Lows in the mid 20s. Light and variable Winds.

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Cottonwood Lake Temperature Statistics

October Temperature

Harvey Municipal Airport (34.8 miles)

  • Lowest 25 October, 2026

    23 °F

  • Average October

    48.8 °F

  • Highest 22 October, 2026

    78.8 °F

Climate (2021–2026)

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

    51.8 °F
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