Gateway Lake Weather Forecast

    • 34
    • 51

    Decreasing Clouds

    • 40
    • 71

    Mostly Sunny

    • 36
    • 70

    Mostly Sunny

    • 30
    • 60

    Mostly Cloudy

    • 26
    • 52

    Mostly Sunny

    • 38
    • 61

    Mostly Cloudy

Today 7 Mar Dakota

Partly sunny in the Morning, then clearing. Highs in the lower 50s. Northwest Winds 15 to 20 Mph.

Tonight 7 Mar Dakota

Mostly clear. Lows in the mid 30s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph.

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Gateway Lake Temperature Statistics

March Temperature

Sioux City, Sioux Gateway Airport (3.1 miles)

  • Lowest 1 March, 2026

    9.6 °F

  • Average March

    34.9 °F

  • Highest 4 March, 2026

    50 °F

Climate (2021–Present)

Sioux City, Sioux Gateway Airport (3.1 miles)

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  • Average Low 2021–2026

    39.1 °F

  • Average 2021–2026

    51.1 °F

  • Average High 2021–2026

    63.2 °F
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