Yankton Weather Forecast

    • 70
    • 90

    Increasing Clouds

    • 67
    • 88

    Partly Sunny

    • 64
    • 86

    Mostly Sunny

    • 66
    • 88

    Partly Sunny

    • 58
    • 83

    Slight Chance Thunderstorms

    • 54
    • 80

    Slight Chance Rain Showers

Today 18 Aug Yankton

Sunny. Highs in the upper 80s. Northwest Winds around 5 Mph.

Tonight 18 Aug Yankton

Mostly clear in the Evening, then becoming partly cloudy. Humid with Lows in the upper 60s. North Winds around 5 Mph. Heat index Values in the upper 90s early in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Yankton Temperature Statistics

August Temperature

Yankton, Chan Gurney Municipal Airport (3.1 miles)

  • Lowest 2 August, 2025

    57.7 °F

  • Average August

    72.9 °F

  • Highest 8 August, 2025

    89.7 °F

Climate (2020–Present)

Yankton, Chan Gurney Municipal Airport (3.1 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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