Lake Yankton Weather Forecast

    • 26
    • 44

    Increasing Clouds

    • 26
    • 47

    Partly Sunny

    • 24
    • 48

    Chance Rain

    • 11
    • 29

    Mostly Cloudy

    • 29
    • 44

    Mostly Cloudy

    • 21
    • 37

    Mostly Cloudy

    • 25
    • 39

    Partly Sunny

Today 15 Dec Yankton

Mostly sunny. Not as cool with Highs in the upper 30s. West Winds 5 to 10 Mph.

Tonight 15 Dec Yankton

Partly cloudy. Lows in the lower 20s. Temperature rising into the upper 20s after midnight. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Yankton Temperature Statistics

December Temperature

Yankton, Chan Gurney Municipal Airport (5.6 miles)

  • Lowest 13 December, 2025

    -5.1 °F

  • Average December

    21.5 °F

  • Highest 9 December, 2025

    46.9 °F

Climate (2020–Present)

Yankton, Chan Gurney Municipal Airport (5.6 miles)

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  • Average Low 2020–2025

    39.2 °F

  • Average 2020–2025

    50.2 °F

  • Average High 2020–2025

    61.3 °F
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