Wynstone Weather Forecast

    • 54
    • 76

    Partly Sunny

    • 64
    • 81

    Partly Sunny

    • 61
    • 86

    Mostly Sunny

    • 66
    • 86

    Slight Chance Thunderstorms

    • 67
    • 87

    Chance Thunderstorms

    • 65
    • 85

    Slight Chance Thunderstorms

Today 5 Aug Union

Mostly sunny. Highs in the upper 70s. Northeast Winds around 5 Mph, becoming east this afternoon.

Tonight 5 Aug Union

Partly cloudy. Lows in the mid 50s. Southeast Winds around 5 Mph.

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Wynstone Temperature Statistics

August Temperature

Sioux City, Sioux Gateway Airport (11.8 miles)

  • Lowest 2 August, 2026

    57.7 °F

  • Average August

    73.3 °F

  • Highest 3 August, 2026

    87.1 °F

Climate (2021–2026)

Sioux City, Sioux Gateway Airport (11.8 miles)

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  • Average Low 2021–2026

    39.1 °F

  • Average 2021–2026

    51.2 °F

  • Average High 2021–2026

    63.4 °F
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