Union Grove Weather Forecast

    • 59
    • 90

    Decreasing Clouds

    • 61
    • 89

    Mostly Sunny

    • 59
    • 87

    Mostly Cloudy

    • 57
    • 81

    Slight Chance Thunderstorms

    • 55
    • 78

    Slight Chance Thunderstorms

    • 53
    • 80

    Partly Sunny

Today 26 May Union

Mostly sunny. Highs in the lower 90s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 26 May Union

Mostly clear. Lows in the upper 50s. Southeast Winds 10 to 15 Mph.

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  • Temperature Real-Time

Union Grove Temperature Statistics

May Temperature

Yankton, Chan Gurney Municipal Airport (30.4 miles)

  • Lowest 6 May, 2026

    30 °F

  • Average May

    58.1 °F

  • Highest 15 May, 2026

    88 °F

Climate (2021–Present)

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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