Gateway Lake Weather Forecast

    • 60
    • 72

    Mostly Cloudy

    • 60
    • 71

    Rain Showers

    • 59
    • 69

    Rain Showers

    • 58
    • 70

    Chance Rain Showers

    • 52
    • 67

    Mostly Cloudy

    • 53
    • 64

    Partly Sunny

Today 27 Sep Dakota

Cloudy. Patchy very light drizzle late this morning. Patchy fog late this morning. Highs in the lower 70s. East Winds around 5 Mph.

Tonight 27 Sep Dakota

Mostly cloudy. A slight chance of Sprinkles in the evening. Lows around 60. East Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Gateway Lake Temperature Statistics

September Temperature

Sioux City, Sioux Gateway Airport (3.1 miles)

  • Lowest 10 September, 2026

    50.6 °F

  • Average September

    70 °F

  • Highest 18 September, 2026

    96.7 °F

Climate (2021–2026)

Sioux City, Sioux Gateway Airport (3.1 miles)

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  • Average Low 2021–2026

    39.2 °F

  • Average 2021–2026

    51.3 °F

  • Average High 2021–2026

    63.4 °F
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