Union Grove Weather Forecast

    • 69
    • 98

    Patchy Smoke

    • 60
    • 84

    Mostly Sunny

    • 62
    • 81

    Mostly Cloudy

    • 63
    • 78

    Chance Rain Showers

    • 64
    • 83

    Partly Sunny

    • 69
    • 88

    Mostly Sunny

Today 20 Jul Union

Sunny, hot with Highs in the upper 90s. Southwest Winds 10 to 15 Mph, becoming northwest this afternoon. Heat index Values up to 109.

Tonight 20 Jul Union

Mostly clear in the Evening, then becoming partly cloudy. Patchy smoke in the evening. Less humid with Lows around 70. North Winds 5 to 10 Mph. Heat index Values up to 104 early in the evening.

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  • Temperature Real-Time

Union Grove Temperature Statistics

July Temperature

Yankton, Chan Gurney Municipal Airport (30.4 miles)

  • Lowest 3 July, 2026

    64.9 °F

  • Average July

    78.7 °F

  • Highest 17 July, 2026

    97 °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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