South Sioux City Weather Forecast

    • 43
    • 93

    Breezy

    • 29
    • 55

    Partly Sunny

    • 37
    • 57

    Mostly Cloudy

    • 45
    • 66

    Mostly Cloudy

    • 46
    • 76

    Mostly Cloudy

    • 30
    • 64

    Mostly Cloudy

Today 21 Mar Dakota

Sunny, warmer with Highs in the lower 90s. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 21 Mar Dakota

Partly cloudy in the Evening, then becoming mostly cloudy. Breezy, cooler with Lows in the lower 40s. South Winds 10 to 15 Mph with Gusts up to 25 Mph, becoming north 15 to 25 Mph with Gusts up to 40 Mph after midnight.

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South Sioux City Temperature Statistics

March Temperature

Sioux City, Sioux Gateway Airport (4.3 miles)

  • Lowest 16 March, 2026

    5.6 °F

  • Average March

    39.1 °F

  • Highest 19 March, 2026

    78.1 °F

Climate (2021–Present)

Sioux City, Sioux Gateway Airport (4.3 miles)

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  • Average Low 2021–2026

    39.1 °F

  • Average 2021–2026

    51.1 °F

  • Average High 2021–2026

    63.1 °F
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