Union Grove Weather Forecast

    • 72
    • 87

    Mostly Cloudy

    • 73
    • 91

    Slight Chance Thunderstorms

    • 68
    • 91

    Chance Thunderstorms

    • 66
    • 84

    Chance Thunderstorms

    • 67
    • 86

    Slight Chance Thunderstorms

    • 71
    • 91

    Slight Chance Thunderstorms

    • 71
    • 93

    Slight Chance Thunderstorms

Today 21 Jul Union

Partly sunny with a slight chance of Showers and Thunderstorms. Highs in the upper 80s. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 20 percent. Heat index Values up to 103.

Tonight 21 Jul Union

Mostly cloudy. Lows in the lower 70s. Southeast Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Union Grove Temperature Statistics

July Temperature

Yankton, Chan Gurney Municipal Airport (30.4 miles)

  • Lowest 17 July, 2025

    55.7 °F

  • Average July

    75.2 °F

  • Highest 3 July, 2025

    94.6 °F

Climate (2020–Present)

Yankton, Chan Gurney Municipal Airport (30.4 miles)

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  • Average Low 2020–2025

    39 °F

  • Average 2020–2025

    50 °F

  • Average High 2020–2025

    61.3 °F
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