St Helena Weather Forecast

    • 55
    • 78

    Chance Rain Showers

    • 45
    • 70

    Mostly Sunny

    • 38
    • 62

    Mostly Sunny

    • 45
    • 63

    Mostly Sunny

    • 43
    • 69

    Partly Sunny

    • 40
    • 62

    Mostly Sunny

Today 16 Oct Cedar

Partly sunny and breezy. Highs in the upper 70s. South Winds 15 to 25 Mph with Gusts up to 40 Mph.

Tonight 16 Oct Cedar

Mostly cloudy with a 50 percent chance of Showers. Lows in the mid 50s. South Winds 15 to 20 Mph with Gusts up to 30 Mph, becoming southwest 5 to 10 Mph with Gusts up to 20 Mph after midnight.

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St Helena Temperature Statistics

October Temperature

Yankton, Chan Gurney Municipal Airport (9.9 miles)

  • Lowest 13 October, 2025

    39 °F

  • Average October

    63.7 °F

  • Highest 3 October, 2025

    91 °F

Climate (2020–Present)

Yankton, Chan Gurney Municipal Airport (9.9 miles)

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  • Average Low 2020–2025

    39.1 °F

  • Average 2020–2025

    50.1 °F

  • Average High 2020–2025

    61.3 °F
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