Lake Yankton Weather Forecast

    • 62
    • 86

    Mostly Sunny

    • 60
    • 83

    Partly Sunny

    • 63
    • 78

    Rain Showers

    • 64
    • 81

    Partly Sunny

    • 62
    • 83

    Slight Chance Thunderstorms

    • 60
    • 81

    Partly Sunny

Today 21 Aug Yankton

Sunny. Highs in the mid 80s. North Winds around 5 Mph.

Tonight 21 Aug Yankton

Mostly clear. Lows in the lower 60s. Northeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Yankton Temperature Statistics

August Temperature

Yankton, Chan Gurney Municipal Airport (5.6 miles)

  • Lowest 5 August, 2026

    52 °F

  • Average August

    72.9 °F

  • Highest 11 August, 2026

    90 °F

Climate (2021–2026)

Yankton, Chan Gurney Municipal Airport (5.6 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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