Gateway Lake Weather Forecast

    • 49
    • 75

    Slight Chance Thunderstorms

    • 57
    • 81

    Chance Thunderstorms

    • 59
    • 86

    Chance Thunderstorms

    • 59
    • 86

    Partly Sunny

    • 58
    • 80

    Chance Thunderstorms

    • 57
    • 79

    Rain Showers Likely

    • 55
    • 78

    Chance Rain Showers

Today 23 May Dakota

Sunny. Highs in the mid 70s. West Winds around 5 Mph.

Tonight 23 May Dakota

Mostly cloudy with a slight chance of Showers and Thunderstorms this Evening, then partly cloudy after midnight. Lows in the upper 40s. South Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Gateway Lake Temperature Statistics

May Temperature

Sioux City, Sioux Gateway Airport (3.1 miles)

  • Lowest 2 May, 2026

    27.6 °F

  • Average May

    57.8 °F

  • Highest 15 May, 2026

    95.6 °F

Climate (2021–Present)

Sioux City, Sioux Gateway Airport (3.1 miles)

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  • Average Low 2021–2026

    39 °F

  • Average 2021–2026

    51.2 °F

  • Average High 2021–2026

    63.3 °F
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