Beaver Lake Weather Forecast

    • 62
    • 84

    Becoming Sunny

    • 62
    • 88

    Chance Thunderstorms

    • 61
    • 76

    Rain Showers Likely

    • 60
    • 71

    Chance Rain Showers

    • 58
    • 70

    Chance Rain Showers

    • 57
    • 72

    Mostly Cloudy

Today 15 Sep Yankton

Sunny. Highs in the mid 80s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 15 Sep Yankton

Mostly clear. Lows in the lower 60s. Southeast Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Beaver Lake Temperature Statistics

September Temperature

Yankton, Chan Gurney Municipal Airport (7.5 miles)

  • Lowest 7 September, 2025

    41 °F

  • Average September

    64.5 °F

  • Highest 11 September, 2025

    84 °F

Climate (2020–Present)

Yankton, Chan Gurney Municipal Airport (7.5 miles)

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  • Average Low 2020–2025

    39 °F

  • Average 2020–2025

    50 °F

  • Average High 2020–2025

    61.2 °F
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