Lewis and Clark Lake Weather Forecast

    • 51
    • 74

    Slight Chance Thunderstorms

    • 58
    • 85

    Mostly Sunny

    • 61
    • 90

    Chance Thunderstorms

    • 59
    • 86

    Partly Sunny

    • 59
    • 83

    Chance Thunderstorms

    • 58
    • 82

    Chance Thunderstorms

Today 23 May Knox

Mostly sunny. Highs in the mid 70s. West Winds 5 to 10 Mph.

Tonight 23 May Knox

Mostly clear. Lows in the mid 40s. West Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lewis and Clark Lake Temperature Statistics

May Temperature

Yankton, Chan Gurney Municipal Airport (8.1 miles)

  • Lowest 6 May, 2026

    30 °F

  • Average May

    57.9 °F

  • Highest 15 May, 2026

    88 °F

Climate (2021–Present)

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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