Union Grove Weather Forecast

    • 59
    • 77

    Rain Showers Likely

    • 58
    • 80

    Rain Showers Likely

    • 58
    • 80

    Rain Showers Likely

    • 56
    • 83

    Chance Thunderstorms

    • 56
    • 82

    Slight Chance Thunderstorms

    • 57
    • 82

    Chance Thunderstorms

Today 29 May Union

Cloudy with a 50 percent chance of Showers. Not as warm with Highs in the upper 70s. Southeast Winds 10 to 15 Mph.

Tonight 29 May Union

Cloudy. A chance of Showers in the Evening, then Showers likely with a chance of Thunderstorms after midnight. Lows around 60. East Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 60 percent.

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  • Temperature Real-Time

Union Grove Temperature Statistics

May Temperature

Yankton, Chan Gurney Municipal Airport (30.4 miles)

  • Lowest 6 May, 2026

    30 °F

  • Average May

    61 °F

  • Highest 25 May, 2026

    93 °F

Climate (2021–Present)

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

    61.9 °F
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