South Yankton Weather Forecast

    • 74
    • 92

    Slight Chance Thunderstorms

    • 68
    • 93

    Rain Showers Likely

    • 67
    • 84

    Slight Chance Thunderstorms

    • 70
    • 87

    Partly Sunny

    • 73
    • 92

    Mostly Sunny

    • 74
    • 95

    Mostly Sunny

    • 71
    • 96

    Slight Chance Thunderstorms

Today 22 Jul Cedar

Mostly sunny. Near steady temperature in the mid 80s. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Heat index Values up to 102.

Tonight 22 Jul Cedar

Partly cloudy. Lows in the lower 70s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Yankton Temperature Statistics

July Temperature

Yankton, Chan Gurney Municipal Airport (4.3 miles)

  • Lowest 17 July, 2025

    55.7 °F

  • Average July

    75.1 °F

  • Highest 3 July, 2025

    94.6 °F

Climate (2020–Present)

Yankton, Chan Gurney Municipal Airport (4.3 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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