Union Grove Weather Forecast

    • 52
    • 82

    Decreasing Clouds

    • 63
    • 82

    Mostly Sunny

    • 59
    • 84

    Slight Chance Thunderstorms

    • 54
    • 74

    Chance Thunderstorms

    • 60
    • 72

    Rain Showers

    • 52
    • 75

    Slight Chance Rain Showers

    • 53
    • 69

    Chance Rain Showers

Today 9 Sep Union

Sunny. Near steady temperature around 80. Northwest Winds 5 to 10 Mph.

Tonight 9 Sep Union

Partly cloudy this Evening, then clearing. Lows in the lower 50s. Northwest Winds 5 to 10 Mph, becoming west after midnight.

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  • Temperature Real-Time

Union Grove Temperature Statistics

September Temperature

Yankton, Chan Gurney Municipal Airport (30.4 miles)

  • Lowest 7 September, 2026

    66 °F

  • Average September

    78.2 °F

  • Highest 4 September, 2026

    95 °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

    61.8 °F
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