Cottonwood Lake Weather Forecast

    • 65
    • 93

    Partly Sunny

    • 67
    • 95

    Partly Sunny

    • 65
    • 93

    Breezy

    • 63
    • 90

    Slight Chance Thunderstorms

    • 59
    • 85

    Slight Chance Thunderstorms

    • 56
    • 84

    Chance Thunderstorms

Today 27 May McHenry

Mostly sunny. Highs around 90. East Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 27 May McHenry

Partly cloudy. Lows in the mid 60s. Southeast Winds 15 to 20 Mph.

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Cottonwood Lake Temperature Statistics

May Temperature

Harvey Municipal Airport (34.8 miles)

  • Lowest 7 May, 2026

    23 °F

  • Average May

    52.7 °F

  • Highest 25 May, 2026

    91.4 °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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