Lewis and Clark Lake Weather Forecast

    • 77
    • 102

    Chance Rain Showers

    • 75
    • 99

    Slight Chance Thunderstorms

    • 73
    • 99

    Hot

    • 69
    • 95

    Partly Sunny

    • 71
    • 95

    Chance Thunderstorms

    • 70
    • 94

    Chance Thunderstorms

Today 25 Jul Knox

Sunny. Much warmer with Highs around 103. Southwest Winds 5 to 10 Mph.

Tonight 25 Jul Knox

Mostly cloudy with a slight chance of Showers and Thunderstorms. Humid with Lows in the mid 70s. South Winds 10 to 15 Mph, becoming southeast after midnight. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lewis and Clark Lake Temperature Statistics

July Temperature

Yankton, Chan Gurney Municipal Airport (8.1 miles)

  • Lowest 22 July, 2026

    59 °F

  • Average July

    77.9 °F

  • Highest 17 July, 2026

    97 °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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