Lewis and Clark Lake Weather Forecast

    • 68
    • 84

    Partly Sunny

    • 68
    • 89

    Mostly Cloudy

    • 68
    • 88

    Chance Thunderstorms

    • 65
    • 86

    Chance Thunderstorms

    • 63
    • 82

    Chance Thunderstorms

    • 60
    • 75

    Chance Thunderstorms

Today 8 Aug Knox

Sunny. A slight chance of Showers this morning. Highs in the upper 80s. South Winds 10 to 15 Mph. Chance of rain 20 percent.

Tonight 8 Aug Knox

Mostly clear in the Evening, then becoming mostly cloudy. Warmer with Lows in the upper 60s. 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

August Temperature

Yankton, Chan Gurney Municipal Airport (8.1 miles)

  • Lowest 5 August, 2026

    52 °F

  • Average August

    70.2 °F

  • Highest 3 August, 2026

    89.1 °F

Climate (2021–2026)

Yankton, Chan Gurney Municipal Airport (8.1 miles)

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  • Average Low 2021–2026

    39.3 °F

  • Average 2021–2026

    50.5 °F

  • Average High 2021–2026

    61.8 °F
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