Lewis and Clark Lake Weather Forecast

    • 65
    • 88

    Chance Rain Showers

    • 66
    • 90

    Mostly Sunny

    • 68
    • 92

    Partly Sunny

    • 70
    • 94

    Chance Thunderstorms

    • 66
    • 91

    Chance Thunderstorms

    • 64
    • 88

    Slight Chance Thunderstorms

Today 4 Jul Knox

Mostly sunny. Patchy fog this morning. A slight chance of Showers and Thunderstorms this afternoon. Highs in the lower 90s. North Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 4 Jul Knox

Partly cloudy. A chance of Showers with a slight chance of Thunderstorms in the evening. Humid with Lows in the mid 60s. Northeast Winds 5 to 10 Mph, becoming southeast after midnight. Chance of rain 40 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 1 July, 2026

    66 °F

  • Average July

    76.3 °F

  • Highest 1 July, 2026

    86 °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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