Dakota Dunes Weather Forecast

    • 63
    • 88

    Increasing Clouds

    • 61
    • 79

    Rain Showers

    • 59
    • 75

    Rain Showers Likely

    • 55
    • 73

    Chance Rain Showers

    • 58
    • 76

    Slight Chance Thunderstorms

    • 59
    • 80

    Partly Sunny

Today 16 Sep Union

Sunny. Highs in the upper 80s. South Winds 5 to 10 Mph.

Tonight 16 Sep Union

Partly cloudy in the Evening, then becoming mostly cloudy. A chance of Showers and Thunderstorms. Humid with Lows in the lower 60s. Southeast Winds 5 to 10 Mph, becoming southwest after midnight. Chance of rain 50 percent.

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  • Temperature Real-Time

Dakota Dunes Temperature Statistics

September Temperature

Sioux City, Sioux Gateway Airport (7.5 miles)

  • Lowest 7 September, 2025

    37.9 °F

  • Average September

    64.6 °F

  • Highest 13 September, 2025

    91.9 °F

Climate (2020–Present)

Sioux City, Sioux Gateway Airport (7.5 miles)

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  • Average Low 2020–2025

    38.8 °F

  • Average 2020–2025

    50.7 °F

  • Average High 2020–2025

    62.6 °F
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