Union Grove Weather Forecast

    • 56
    • 83

    Mostly Cloudy

    • 67
    • 81

    Slight Chance Rain Showers

    • 68
    • 88

    Chance Thunderstorms

    • 65
    • 86

    Chance Thunderstorms

    • 63
    • 82

    Chance Thunderstorms

    • 61
    • 78

    Slight Chance Thunderstorms

Today 7 Aug Union

Mostly cloudy late this Morning, then becoming partly sunny. Highs in the mid 80s. Southwest Winds around 10 Mph, becoming northwest this afternoon.

Tonight 7 Aug Union

Partly cloudy. Less humid with Lows in the upper 50s. North Winds 5 to 10 Mph, becoming east after midnight.

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  • Temperature Real-Time

Union Grove Temperature Statistics

August Temperature

Yankton, Chan Gurney Municipal Airport (30.4 miles)

  • Lowest 5 August, 2026

    52 °F

  • Average August

    70.5 °F

  • Highest 3 August, 2026

    89.1 °F

Climate (2021–2026)

Yankton, Chan Gurney Municipal Airport (30.4 miles)

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  • Average Low 2021–2026

    39.3 °F

  • Average 2021–2026

    50.5 °F

  • Average High 2021–2026

    61.8 °F
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