South Yankton Weather Forecast

    • 45
    • 61

    Rain Showers

    • 39
    • 53

    Rain Showers Likely

    • 39
    • 54

    Chance Rain Showers

    • 41
    • 63

    Partly Sunny

    • 48
    • 64

    Chance Rain Showers

    • 50
    • 68

    Chance Rain Showers

    • 49
    • 67

    Chance Rain Showers

Today 19 May Cedar

Showers and Thunderstorms likely. Cooler. Near steady temperature in the upper 50s. East Winds around 15 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.

Tonight 19 May Cedar

A chance of Thunderstorms. A chance of Showers early this Evening, then Showers likely. Lows in the mid 40s. East Winds 10 to 15 Mph, becoming north. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Yankton Temperature Statistics

May Temperature

Yankton, Chan Gurney Municipal Airport (4.3 miles)

  • Lowest 3 May, 2025

    37.7 °F

  • Average May

    64 °F

  • Highest 11 May, 2025

    89.7 °F

Climate (2020–Present)

Yankton, Chan Gurney Municipal Airport (4.3 miles)

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  • Average Low 2020–2025

    39.1 °F

  • Average 2020–2025

    50.1 °F

  • Average High 2020–2025

    61.4 °F
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