Union Grove Weather Forecast

    • 62
    • 80

    Rain Showers Likely

    • 65
    • 80

    Chance Rain Showers

    • 72
    • 94

    Mostly Sunny

    • 74
    • 97

    Hot

    • 70
    • 96

    Mostly Sunny

    • 69
    • 91

    Partly Sunny

Today 23 Jul Union

Mostly cloudy. Highs around 80. Southeast Winds 5 to 10 Mph.

Tonight 23 Jul Union

A chance of Showers in the Evening, then Showers likely with a slight chance of Thunderstorms after midnight. Humid with Lows in the lower 60s. South Winds 5 to 10 Mph. Chance of rain 70 percent.

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Union Grove Temperature Statistics

July Temperature

Yankton, Chan Gurney Municipal Airport (30.4 miles)

  • Lowest 3 July, 2026

    64.9 °F

  • Average July

    79.2 °F

  • Highest 17 July, 2026

    97 °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

    61.9 °F
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