Union Grove Weather Forecast

    • 57
    • 68

    Slight Chance Rain Showers

    • 53
    • 65

    Rain Showers Likely

    • 47
    • 60

    Rain Showers Likely

    • 48
    • 63

    Mostly Cloudy

    • 53
    • 67

    Mostly Cloudy

    • 54
    • 67

    Slight Chance Rain Showers

Today 19 Sep Union

Mostly cloudy. A chance of Showers and Thunderstorms in the morning. Patchy fog in the morning. Not as warm and humid. Near steady temperature in the upper 60s. North Winds 5 to 10 Mph. Chance of rain 30 percent.

Tonight 19 Sep Union

Cloudy. Lows in the upper 50s. North Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Union Grove Temperature Statistics

September Temperature

Yankton, Chan Gurney Municipal Airport (30.4 miles)

  • Lowest 13 September, 2026

    48.9 °F

  • Average September

    71.9 °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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