Lake Yankton Weather Forecast

    • 63
    • 84

    Sunny

    • 61
    • 89

    Slight Chance Thunderstorms

    • 60
    • 80

    Rain Showers Likely

    • 59
    • 73

    Rain Showers Likely

    • 57
    • 71

    Chance Thunderstorms

    • 56
    • 71

    Slight Chance Thunderstorms

Today 15 Sep Lyon

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

Tonight 15 Sep Lyon

Clear. Lows in the mid 60s. South Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Yankton Temperature Statistics

September Temperature

Tracy, Tracy Municipal Airport (12.4 miles)

  • Lowest 4 September, 2025

    39.2 °F

  • Average September

    61.5 °F

  • Highest 13 September, 2025

    89.6 °F

Climate (2020–Present)

Tracy, Tracy Municipal Airport (12.4 miles)

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  • Average Low 2020–2025

    38.2 °F

  • Average 2020–2025

    47.5 °F

  • Average High 2020–2025

    57 °F
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