Lewis and Clark Lake Weather Forecast

    • 37
    • 49

    Increasing Clouds

    • 31
    • 58

    Mostly Sunny

    • 35
    • 45

    Mostly Cloudy

    • 37
    • 56

    Mostly Cloudy

    • 26
    • 57

    Mostly Cloudy

    • 30
    • 44

    Mostly Cloudy

Today 21 Dec Knox

Mostly sunny. Highs around 50. South Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 21 Dec Knox

Mostly cloudy in the Evening, then becoming partly cloudy. Not as cool with Lows in the upper 30s. South Winds 15 to 20 Mph with Gusts up to 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lewis and Clark Lake Temperature Statistics

December Temperature

Yankton, Chan Gurney Municipal Airport (8.1 miles)

  • Lowest 14 December, 2025

    -13 °F

  • Average December

    23.9 °F

  • Highest 16 December, 2025

    54 °F

Climate (2020–Present)

Yankton, Chan Gurney Municipal Airport (8.1 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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