McCook Lake Weather Forecast

    • 51
    • 78

    Increasing Clouds

    • 32
    • 75

    Rain/Snow

    • 23
    • 41

    Snow Likely

    • 34
    • 52

    Mostly Sunny

    • 39
    • 72

    Mostly Sunny

    • 28
    • 58

    Chance Rain/Snow

Today 13 Mar Union

Sunny, warmer with Highs in the upper 70s. South Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 13 Mar Union

Partly cloudy. Not as cool with Lows in the lower 50s. Southeast Winds 15 to 20 Mph with Gusts up to 30 Mph.

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McCook Lake Temperature Statistics

March Temperature

Sioux City, Sioux Gateway Airport (11.2 miles)

  • Lowest 2 March, 2025

    18.8 °F

  • Average March

    37.6 °F

  • Highest 10 March, 2025

    73 °F

Climate (2020–Present)

Sioux City, Sioux Gateway Airport (11.2 miles)

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  • Average Low 2020–2025

    38.8 °F

  • Average 2020–2025

    50.5 °F

  • Average High 2020–2025

    62.3 °F
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