Union Grove Weather Forecast

    • 29
    • 45

    Rain Showers

    • 8
    • 32

    Snow Showers

    • 26
    • 36

    Mostly Cloudy

    • 17
    • 35

    Partly Sunny

    • 22
    • 34

    Mostly Cloudy

    • 28
    • 40

    Mostly Cloudy

Today 17 Dec Union

Mostly sunny and breezy. Highs in the mid 40s. Southeast Winds 10 to 15 Mph, becoming south 15 to 25 Mph with Gusts up to 35 Mph this afternoon.

Tonight 17 Dec Union

Mostly cloudy. Rain Likely, mainly in the evening. Breezy with Lows around 30. Southwest Winds 20 to 25 Mph, becoming west 15 to 25 Mph after midnight. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Union Grove Temperature Statistics

December Temperature

Yankton, Chan Gurney Municipal Airport (30.4 miles)

  • Lowest 14 December, 2025

    -13 °F

  • Average December

    21.2 °F

  • Highest 9 December, 2025

    46.9 °F

Climate (2020–Present)

Yankton, Chan Gurney Municipal Airport (30.4 miles)

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  • Average Low 2020–2025

    39.2 °F

  • Average 2020–2025

    50.2 °F

  • Average High 2020–2025

    61.3 °F
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