Lewis and Clark Lake State Recreation Area Weather Forecast

    • 67
    • 86

    Rain Showers

    • 62
    • 81

    Slight Chance Rain Showers

    • 64
    • 83

    Mostly Sunny

    • 66
    • 87

    Mostly Sunny

    • 67
    • 88

    Breezy

    • 61
    • 79

    Chance Thunderstorms

Today 30 Jul Knox

Mostly cloudy with a chance of Thunderstorms. A chance of Showers. Humid with Highs in the upper 80s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 50 percent. Heat index Values up to 101 this afternoon.

Tonight 30 Jul Knox

Mostly cloudy with a chance of Thunderstorms. Showers, mainly in the evening. Locally heavy rainfall possible in the evening. Humid with Lows in the mid 60s. Southeast Winds 10 to 15 Mph, becoming northwest after midnight. Chance of rain 90 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lewis and Clark Lake State Recreation Area Temperature Statistics

July Temperature

Yankton, Chan Gurney Municipal Airport (11.8 miles)

  • Lowest 22 July, 2026

    59 °F

  • Average July

    78.4 °F

  • Highest 25 July, 2026

    98.1 °F

Climate (2021–2026)

Yankton, Chan Gurney Municipal Airport (11.8 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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