Sioux City Weather Forecast

    • 41
    • 70

    Mostly Sunny

    • 56
    • 71

    Slight Chance Thunderstorms

    • 60
    • 77

    Chance Thunderstorms

    • 60
    • 81

    Partly Sunny

    • 63
    • 82

    Slight Chance Thunderstorms

    • 64
    • 81

    Slight Chance Thunderstorms

    • 65
    • 83

    Mostly Cloudy

Today 6 Sep Woodbury

Sunny. Near steady temperature in the lower 60s. Northwest Winds 5 to 10 Mph.

Tonight 6 Sep Woodbury

Mostly clear. Lows around 40. North Winds around 5 Mph, becoming east around 5 Mph after midnight.

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 4 September, 2025

    43 °F

  • Average September

    61.8 °F

  • Highest 2 September, 2025

    75.9 °F

Climate (2020–Present)

Sioux City, Sioux Gateway Airport (6.2 miles)

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

  • Average Low 2020–2025

    38.8 °F

  • Average 2020–2025

    50.6 °F

  • Average High 2020–2025

    62.5 °F
Get WillyWeather+ to remove ads