Gateway Lake Weather Forecast

    • 57
    • 70

    Chance Thunderstorms

    • 56
    • 79

    Rain Showers

    • 52
    • 70

    Rain Showers Likely

    • 57
    • 66

    Chance Rain Showers

    • 57
    • 73

    Chance Thunderstorms

    • 54
    • 72

    Chance Rain Showers

Today 13 Sep Dakota

A slight chance of Thunderstorms this morning. Mostly cloudy with a chance of Showers. Highs around 70. East Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 13 Sep Dakota

Mostly cloudy. A chance of Showers and Thunderstorms after midnight. Lows in the mid 50s. Southeast Winds 10 to 15 Mph. Gusts up to 30 Mph after midnight. Chance of rain 40 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Gateway Lake Temperature Statistics

September Temperature

Sioux City, Sioux Gateway Airport (3.1 miles)

  • Lowest 10 September, 2026

    50 °F

  • Average September

    77 °F

  • Highest 3 September, 2026

    93.7 °F

Climate (2021–2026)

Sioux City, Sioux Gateway Airport (3.1 miles)

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

  • Average Low 2021–2026

    39.1 °F

  • Average 2021–2026

    51.3 °F

  • Average High 2021–2026

    63.4 °F
Get WillyWeather+ to remove ads