Lewis and Clark Lake Weather Forecast

    • 54
    • 73

    Chance Rain Showers

    • 58
    • 71

    Rain Showers

    • 56
    • 81

    Rain Showers

    • 54
    • 70

    Chance Rain Showers

    • 58
    • 69

    Chance Rain Showers

    • 55
    • 71

    Chance Thunderstorms

Today 12 Sep Knox

Sunny. Not as warm with Highs in the lower 70s. North Winds 10 to 15 Mph.

Tonight 12 Sep Knox

Partly cloudy. A slight chance of Showers and Thunderstorms after midnight. Lows in the lower 50s. East Winds around 5 Mph. Chance of rain 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Lewis and Clark Lake Temperature Statistics

September Temperature

Yankton, Chan Gurney Municipal Airport (8.1 miles)

  • Lowest 10 September, 2026

    54 °F

  • Average September

    76.1 °F

  • Highest 4 September, 2026

    95 °F

Climate (2021–2026)

Yankton, Chan Gurney Municipal Airport (8.1 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    39.4 °F

  • Average 2021–2026

    50.6 °F

  • Average High 2021–2026

    61.8 °F
Get WillyWeather+ to remove ads