North Sioux City Weather Forecast

    • 57
    • 81

    Rain Showers

    • 53
    • 70

    Rain Showers Likely

    • 55
    • 77

    Chance Thunderstorms

    • 54
    • 77

    Chance Thunderstorms

    • 52
    • 76

    Mostly Sunny

    • 55
    • 78

    Chance Rain Showers

    • 61
    • 80

    Chance Rain Showers

Today 20 Jun Union

Mostly sunny. Highs around 80. East Winds 5 to 10 Mph.

Tonight 20 Jun Union

A slight chance of Thunderstorms. Showers. Lows in the upper 50s. Southeast Winds 10 to 15 Mph. Chance of rain 90 percent.

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North Sioux City Temperature Statistics

June Temperature

Sioux City, Sioux Gateway Airport (9.9 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 (9.9 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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