Union Grove Weather Forecast

    • 40
    • 68

    Chance Rain Showers

    • 44
    • 64

    Partly Sunny

    • 47
    • 63

    Rain Showers Likely

    • 51
    • 63

    Chance Rain Showers

    • 52
    • 65

    Rain Showers Likely

    • 48
    • 62

    Rain Showers Likely

Today 28 Oct Union

Mostly cloudy. A slight chance of Sprinkles this Morning, then a chance of Showers this afternoon. Much warmer with Highs around 70. Southeast Winds 10 to 15 Mph, becoming southwest this afternoon. Chance of rain 50 percent.

Tonight 28 Oct Union

Partly cloudy. Lows in the lower 40s. Northwest Winds 5 to 10 Mph.

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Union Grove Temperature Statistics

October Temperature

Yankton, Chan Gurney Municipal Airport (30.4 miles)

  • Lowest 17 October, 2026

    33.1 °F

  • Average October

    58 °F

  • Highest 10 October, 2026

    91.9 °F

Climate (2021–2026)

Yankton, Chan Gurney Municipal Airport (30.4 miles)

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  • Average Low 2021–2026

    39.5 °F

  • Average 2021–2026

    50.6 °F

  • Average High 2021–2026

    61.8 °F
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