McCook Lake Weather Forecast

    • 40
    • 50

    Rain Likely

    • 32
    • 52

    Mostly Cloudy

    • 34
    • 56

    Mostly Sunny

    • 29
    • 49

    Mostly Cloudy

    • 33
    • 49

    Partly Sunny

    • 40
    • 60

    Partly Sunny

    • 34
    • 60

    Mostly Sunny

Today 28 Oct Union

Cloudy with a 50 percent chance of rain. Near steady temperature in the upper 40s. Northwest Winds 15 to 20 Mph with Gusts up to 35 Mph.

Tonight 28 Oct Union

Mostly cloudy. A chance of rain this evening. Lows in the upper 30s. North Winds 15 to 20 Mph with Gusts up to 40 Mph. Chance of rain 50 percent.

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McCook Lake Temperature Statistics

October Temperature

Sioux City, Sioux Gateway Airport (11.2 miles)

  • Lowest 22 October, 2025

    26.1 °F

  • Average October

    58.7 °F

  • Highest 2 October, 2025

    89.1 °F

Climate (2020–Present)

Sioux City, Sioux Gateway Airport (11.2 miles)

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  • Average Low 2020–2025

    39 °F

  • Average 2020–2025

    50.9 °F

  • Average High 2020–2025

    62.8 °F
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