Big Sioux River Corridor Weather Forecast

    • 40
    • 74

    Increasing Clouds

    • 44
    • 76

    Mostly Sunny

    • 44
    • 85

    Partly Sunny

    • 26
    • 55

    Partly Sunny

    • 37
    • 53

    Mostly Cloudy

    • 41
    • 63

    Partly Sunny

Today 19 Mar Plymouth

Mostly sunny. Highs around 70. Northeast Winds around 5 Mph, becoming south this afternoon.

Tonight 19 Mar Plymouth

Mostly cloudy in the Evening, then clearing. Lows in the lower 40s. South Winds 5 to 10 Mph, becoming southwest after midnight.

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Big Sioux River Corridor Temperature Statistics

March Temperature

Sioux City, Sioux Gateway Airport (19.3 miles)

  • Lowest 16 March, 2026

    5 °F

  • Average March

    38.2 °F

  • Highest 8 March, 2026

    72 °F

Climate (2021–Present)

Sioux City, Sioux Gateway Airport (19.3 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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