Cottonwood Lake Weather Forecast

    • 55
    • 83

    Increasing Clouds

    • 58
    • 91

    Partly Sunny

    • 60
    • 91

    Breezy

    • 60
    • 89

    Partly Sunny

    • 59
    • 88

    Partly Sunny

    • 57
    • 84

    Slight Chance Thunderstorms

Today 24 May McHenry

Sunny. Highs in the lower 80s. South Winds 5 to 15 Mph.

Tonight 24 May McHenry

Clear. Lows in the lower 40s. South Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cottonwood Lake Temperature Statistics

May Temperature

Harvey Municipal Airport (34.8 miles)

  • Lowest 7 May, 2026

    23 °F

  • Average May

    50.9 °F

  • Highest 11 May, 2026

    80.6 °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

    51.9 °F
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