Sioux City Weather Forecast

    • 69
    • 87

    Thunderstorms Likely

    • 73
    • 90

    Chance Thunderstorms

    • 64
    • 89

    Rain Showers Likely

    • 59
    • 81

    Partly Sunny

    • 62
    • 83

    Partly Sunny

    • 63
    • 85

    Mostly Sunny

Today 6 Sep Woodbury

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms in the Morning, then a chance of Showers and Thunderstorms in the afternoon. Humid with Highs in the mid 80s. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

Tonight 6 Sep Woodbury

Partly cloudy. Near steady temperature in the mid 70s. Southeast Winds 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Sioux City Temperature Statistics

September Temperature

Sioux City, Sioux Gateway Airport (6.2 miles)

  • Lowest 1 September, 2026

    67.6 °F

  • Average September

    80.9 °F

  • Highest 3 September, 2026

    93 °F

Climate (2021–2026)

Sioux City, Sioux Gateway Airport (6.2 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