Cottonwood Lake Weather Forecast

    • 55
    • 82

    Partly Sunny

    • 52
    • 90

    Mostly Sunny

    • 54
    • 80

    Mostly Sunny

    • 53
    • 82

    Mostly Sunny

    • 54
    • 79

    Chance Rain Showers

    • 54
    • 76

    Chance Rain Showers

Today 5 Aug McHenry

Partly sunny. Highs in the lower 80s. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 5 Aug McHenry

Partly cloudy. Lows in the mid 50s. West Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming south after midnight.

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Cottonwood Lake Temperature Statistics

August Temperature

Harvey Municipal Airport (34.8 miles)

  • Lowest 3 August, 2026

    51.8 °F

  • Average August

    73.7 °F

  • Highest 2 August, 2026

    98.6 °F

Climate (2021–2026)

Harvey Municipal Airport (34.8 miles)

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  • Average Low 2021–2026

    30.4 °F

  • Average 2021–2026

    41.2 °F

  • Average High 2021–2026

    51.8 °F
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