Lake Henry Weather Forecast

    • 62
    • 86

    Becoming Sunny

    • 62
    • 88

    Chance Thunderstorms

    • 60
    • 77

    Rain Showers Likely

    • 57
    • 72

    Chance Rain Showers

    • 56
    • 71

    Chance Rain Showers

    • 56
    • 72

    Mostly Cloudy

Today 15 Sep Bon Homme

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

Tonight 15 Sep Bon Homme

Mostly cloudy. Lows around 60. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Henry Temperature Statistics

September Temperature

Yankton, Chan Gurney Municipal Airport (22.4 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 (22.4 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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