Union Grove Weather Forecast

    • 65
    • 80

    Rain Showers Likely

    • 64
    • 75

    Rain Showers Likely

    • 63
    • 78

    Chance Thunderstorms

    • 57
    • 75

    Partly Sunny

    • 61
    • 73

    Chance Rain Showers

    • 61
    • 76

    Chance Thunderstorms

    • 58
    • 74

    Slight Chance Thunderstorms

Today 13 Aug Union

Mostly cloudy with a slight chance of Showers and Thunderstorms. Near steady temperature in the upper 70s. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

Tonight 13 Aug Union

Mostly cloudy. A slight chance of Showers and Thunderstorms this Evening, then Showers likely with a chance of Thunderstorms after midnight. Lows in the mid 60s. East Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • 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

    72.2 °F

  • Highest 11 August, 2026

    90 °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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