Clay County Park Weather Forecast

    • 40
    • 69

    Mostly Sunny

    • 57
    • 73

    Slight Chance Thunderstorms

    • 59
    • 78

    Chance Thunderstorms

    • 60
    • 83

    Partly Sunny

    • 63
    • 84

    Slight Chance Thunderstorms

    • 65
    • 82

    Chance Thunderstorms

    • 65
    • 84

    Chance Rain Showers

Today 6 Sep Clay

Sunny. Highs in the upper 60s. Northwest Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 6 Sep Clay

Mostly clear. Lows in the upper 30s. North Winds 5 to 10 Mph, becoming east after midnight.

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Clay County Park Temperature Statistics

September Temperature

Yankton, Chan Gurney Municipal Airport (21.1 miles)

  • Lowest 4 September, 2025

    45 °F

  • Average September

    64.5 °F

  • Highest 2 September, 2025

    79 °F

Climate (2020–Present)

Yankton, Chan Gurney Municipal Airport (21.1 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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