Cottonwood Lake National Wildlife Refuge Weather Forecast

    • 55
    • 81

    Increasing Clouds

    • 52
    • 88

    Mostly Sunny

    • 54
    • 79

    Mostly Sunny

    • 54
    • 82

    Mostly Sunny

    • 54
    • 79

    Chance Rain Showers

    • 55
    • 76

    Chance Rain Showers

Today 5 Aug McHenry

Mostly sunny. Highs around 80. Southwest Winds 5 to 10 Mph, increasing to west 15 to 20 Mph in the afternoon.

Tonight 5 Aug McHenry

Partly cloudy. Lows in the lower 50s. Southwest Winds 5 to 10 Mph. Gusts up to 25 Mph in the evening.

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Cottonwood Lake National Wildlife Refuge Temperature Statistics

August Temperature

Harvey Municipal Airport (34.2 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 (34.2 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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