Dakota Dunes Weather Forecast

    • 60
    • 84

    Increasing Clouds

    • 45
    • 80

    Breezy

    • 50
    • 81

    Mostly Sunny

    • 54
    • 84

    Chance Rain Showers

    • 53
    • 89

    Slight Chance Thunderstorms

    • 57
    • 89

    Chance Thunderstorms

    • 52
    • 87

    Chance Thunderstorms

Today 11 May Union

Mostly sunny. Warmer with Highs in the mid 80s. South Winds 15 to 20 Mph.

Tonight 11 May Union

Partly cloudy this Evening, then mostly cloudy with a slight chance of Showers after midnight. Not as cool with Lows around 60. South Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Dakota Dunes Temperature Statistics

May Temperature

Sioux City, Sioux Gateway Airport (7.5 miles)

  • Lowest 2 May, 2026

    27.6 °F

  • Average May

    53 °F

  • Highest 8 May, 2026

    81.6 °F

Climate (2021–Present)

Sioux City, Sioux Gateway Airport (7.5 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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