Cottonwood Lake Weather Forecast

    • 29
    • 49

    Breezy

    • 38
    • 52

    Mostly Sunny

    • 47
    • 69

    Mostly Sunny

    • 36
    • 62

    Mostly Sunny

    • 41
    • 64

    Mostly Sunny

    • 41
    • 65

    Partly Sunny

Today 15 Oct McHenry

Increasing Clouds. Windy. Highs in the upper 40s. Northwest Winds 15 to 30 Mph with Gusts up to 45 Mph.

Tonight 15 Oct McHenry

Mostly cloudy in the evening then clearing. Lows in the upper 20s. Northwest Winds 20 to 25 Mph with Gusts up to 45 Mph, Diminishing to 10 to 15 Mph with Gusts up to 25 Mph after midnight.

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Cottonwood Lake Temperature Statistics

October Temperature

Harvey Municipal Airport (34.8 miles)

  • Lowest 2 October, 2026

    33.8 °F

  • Average October

    51.5 °F

  • Highest 9 October, 2026

    75.2 °F

Climate (2021–2026)

Harvey Municipal Airport (34.8 miles)

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  • Average Low 2021–2026

    30.3 °F

  • Average 2021–2026

    41.1 °F

  • Average High 2021–2026

    51.7 °F
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