Union Grove Weather Forecast

    • 48
    • 71

    Becoming Sunny

    • 57
    • 71

    Sunny

    • 55
    • 78

    Mostly Sunny

    • 55
    • 72

    Partly Sunny

    • 54
    • 70

    Partly Sunny

    • 60
    • 70

    Mostly Sunny

Today 4 Oct Union

Sunny. Highs in the lower 70s. Northwest Winds around 5 Mph.

Tonight 4 Oct Union

Mostly clear. Lows in the upper 40s. Light and variable Winds, becoming southeast around 5 Mph after midnight.

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Union Grove Temperature Statistics

October Temperature

Yankton, Chan Gurney Municipal Airport (30.4 miles)

  • Lowest 1 October, 2026

    50 °F

  • Average October

    61 °F

  • Highest 1 October, 2026

    70 °F

Climate (2021–2026)

Yankton, Chan Gurney Municipal Airport (30.4 miles)

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  • Average Low 2021–2026

    39.4 °F

  • Average 2021–2026

    50.5 °F

  • Average High 2021–2026

    61.7 °F
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