South Yankton Weather Forecast

    • 29
    • 45

    Increasing Clouds

    • 21
    • 39

    Partly Sunny

    • 33
    • 43

    Partly Sunny

    • 32
    • 55

    Partly Sunny

    • 31
    • 47

    Mostly Cloudy

    • 34
    • 52

    Partly Sunny

Today 19 Dec Cedar

Mostly sunny and Blustery. Not as cool with Highs in the mid 40s. South Winds 15 to 25 Mph with Gusts up to 40 Mph.

Tonight 19 Dec Cedar

Partly cloudy in the Evening, then becoming mostly cloudy. Not as cool with Lows around 30. Southwest Winds 10 to 15 Mph, becoming northwest 15 to 20 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Yankton Temperature Statistics

December Temperature

Yankton, Chan Gurney Municipal Airport (4.3 miles)

  • Lowest 14 December, 2025

    -13 °F

  • Average December

    22.4 °F

  • Highest 16 December, 2025

    54 °F

Climate (2020–Present)

Yankton, Chan Gurney Municipal Airport (4.3 miles)

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  • Average Low 2020–2025

    39.2 °F

  • Average 2020–2025

    50.2 °F

  • Average High 2020–2025

    61.4 °F
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