Gateway Lake Weather Forecast

    • 57
    • 79

    Partly Sunny

    • 63
    • 82

    Partly Sunny

    • 59
    • 78

    Rain Showers Likely

    • 57
    • 75

    Slight Chance Thunderstorms

    • 59
    • 76

    Slight Chance Thunderstorms

    • 60
    • 81

    Slight Chance Thunderstorms

Today 16 Aug Dakota

Partly sunny in the Morning, then clearing. Humid with Highs in the upper 70s. North Winds 5 to 10 Mph.

Tonight 16 Aug Dakota

Partly cloudy. Lows in the lower 60s. Northwest Winds around 5 Mph.

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Gateway Lake Temperature Statistics

August Temperature

Sioux City, Sioux Gateway Airport (3.1 miles)

  • Lowest 8 August, 2026

    50.6 °F

  • Average August

    73.5 °F

  • Highest 11 August, 2026

    94.6 °F

Climate (2021–2026)

Sioux City, Sioux Gateway Airport (3.1 miles)

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  • Average Low 2021–2026

    39.1 °F

  • Average 2021–2026

    51.2 °F

  • Average High 2021–2026

    63.4 °F
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