Steffan Reservoir Weather Forecast

    • 16
    • 34

    Mostly Cloudy

    • -5
    • 22

    Partly Sunny

    • 18
    • 29

    Partly Sunny

    • 19
    • 33

    Mostly Cloudy

    • 9
    • 28

    Mostly Cloudy

    • 13
    • 22

    Mostly Cloudy

Today 2 Dec Knox

Partly sunny. Highs in the mid 30s. Southwest Winds 5 to 10 Mph.

Tonight 2 Dec Knox

Cloudy with a chance of Flurries. A slight chance of freezing rain after midnight. Lows around 15. West Winds 5 to 10 Mph, becoming northwest 10 to 15 Mph with Gusts up to 25 Mph after midnight. Chance of precipitation 20 percent.

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Steffan Reservoir Temperature Statistics

December Temperature

Yankton, Chan Gurney Municipal Airport (11.2 miles)

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  • Average December

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Climate (2020–Present)

Yankton, Chan Gurney Municipal Airport (11.2 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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