Union Grove Weather Forecast

    • 68
    • 85

    Severe Tstms

    • 67
    • 84

    Chance Thunderstorms

    • 65
    • 83

    Rain Showers Likely

    • 61
    • 74

    Chance Thunderstorms

    • 62
    • 73

    Chance Thunderstorms

    • 60
    • 74

    Chance Rain Showers

Today 10 Aug Union

Partly sunny. Near steady temperature in the mid 80s. East Winds 5 to 10 Mph. Heat index Values in the upper 90s.

Tonight 10 Aug Union

Mostly cloudy. A chance of Sprinkles this Evening, then a chance of Showers and Thunderstorms after midnight. Some Thunderstorms may be severe. Lows in the upper 60s. East Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Union Grove Temperature Statistics

August Temperature

Yankton, Chan Gurney Municipal Airport (30.4 miles)

  • Lowest 5 August, 2026

    52 °F

  • Average August

    70.2 °F

  • Highest 3 August, 2026

    89.1 °F

Climate (2021–2026)

Yankton, Chan Gurney Municipal Airport (30.4 miles)

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  • Average Low 2021–2026

    39.3 °F

  • Average 2021–2026

    50.5 °F

  • Average High 2021–2026

    61.8 °F
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