St Helena Weather Forecast

    • 18
    • 36

    Mostly Cloudy

    • 5
    • 28

    Snow

    • 3
    • 13

    Mostly Cloudy

    • 21
    • 33

    Partly Sunny

    • 23
    • 39

    Mostly Cloudy

    • 13
    • 29

    Mostly Cloudy

Today 5 Dec Cedar

Partly sunny. Not as cool with Highs in the upper 30s. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 5 Dec Cedar

Mostly cloudy. Lows around 19. Northwest Winds 5 to 10 Mph, becoming west after midnight.

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St Helena Temperature Statistics

December Temperature

Yankton, Chan Gurney Municipal Airport (9.9 miles)

  • Lowest 2 December, 2025

    0 °F

  • Average December

    18.7 °F

  • Highest 2 December, 2025

    36 °F

Climate (2020–Present)

Yankton, Chan Gurney Municipal Airport (9.9 miles)

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  • Average Low 2020–2025

    39.3 °F

  • Average 2020–2025

    50.2 °F

  • Average High 2020–2025

    61.4 °F
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