Lewis and Clark Lake Weather Forecast

    • 72
    • 94

    Increasing Clouds

    • 72
    • 95

    Partly Sunny

    • 68
    • 90

    Chance Thunderstorms

    • 66
    • 87

    Chance Thunderstorms

    • 68
    • 90

    Slight Chance Thunderstorms

    • 68
    • 91

    Slight Chance Thunderstorms

Today 29 Aug Knox

Sunny. Highs in the mid 90s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 29 Aug Knox

Partly cloudy in the Evening, then becoming mostly cloudy. Humid with Lows in the lower 70s. Southwest Winds 5 to 10 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

    72.6 °F

  • Highest 11 August, 2026

    90 °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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