McCook Lake Weather Forecast

    • 53
    • 71

    Chance Rain Showers

    • 55
    • 78

    Chance Thunderstorms

    • 54
    • 78

    Chance Thunderstorms

    • 52
    • 77

    Mostly Sunny

    • 56
    • 79

    Chance Rain Showers

    • 61
    • 81

    Chance Rain Showers

Today 21 Jun Union

Cloudy. Showers Likely, mainly in the morning. Not as warm with Highs in the upper 60s. East Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 70 percent.

Tonight 21 Jun Union

Mostly cloudy. A chance of Showers in the evening. Lows in the lower 50s. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph, Diminishing to around 5 Mph after midnight. Chance of rain 30 percent.

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McCook Lake Temperature Statistics

June Temperature

Sioux City, Sioux Gateway Airport (11.2 miles)

  • Lowest 15 June, 2026

    43.6 °F

  • Average June

    72.5 °F

  • Highest 9 June, 2026

    95.6 °F

Climate (2021–2026)

Sioux City, Sioux Gateway Airport (11.2 miles)

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  • Average Low 2021–2026

    39 °F

  • Average 2021–2026

    51.2 °F

  • Average High 2021–2026

    63.4 °F
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