North Sioux City Weather Forecast

    • 55
    • 76

    Partly Sunny

    • 64
    • 80

    Partly Sunny

    • 62
    • 86

    Mostly Sunny

    • 67
    • 86

    Slight Chance Thunderstorms

    • 67
    • 87

    Chance Thunderstorms

    • 65
    • 85

    Slight Chance Thunderstorms

Today 5 Aug Union

Mostly sunny. Highs in the upper 70s. Northeast Winds around 5 Mph, becoming east this afternoon.

Tonight 5 Aug Union

Partly cloudy. Lows in the mid 50s. Southeast Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

North Sioux City Temperature Statistics

August Temperature

Sioux City, Sioux Gateway Airport (9.9 miles)

  • Lowest 2 August, 2026

    57.7 °F

  • Average August

    73.3 °F

  • Highest 3 August, 2026

    87.1 °F

Climate (2021–2026)

Sioux City, Sioux Gateway Airport (9.9 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    39.1 °F

  • Average 2021–2026

    51.2 °F

  • Average High 2021–2026

    63.4 °F
Get WillyWeather+ to remove ads