Steffan Reservoir Weather Forecast

    • 25
    • 49

    Breezy

    • 20
    • 29

    Mostly Cloudy

    • 16
    • 36

    Slight Chance Freezing Rain

    • 5
    • 22

    Chance Snow

    • -4
    • 11

    Mostly Cloudy

    • 11
    • 20

    Partly Sunny

    • 15
    • 32

    Partly Sunny

Today 9 Dec Knox

Mostly cloudy with a chance of Sprinkles. Not as cool. Near steady temperature in the lower 50s. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 9 Dec Knox

Partly cloudy and windy. Lows in the mid 20s. Northwest Winds 20 to 30 Mph with Gusts up to 60 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Steffan Reservoir Temperature Statistics

December Temperature

Yankton, Chan Gurney Municipal Airport (11.2 miles)

  • Lowest 3 December, 2025

    -4 °F

  • Average December

    21.2 °F

  • Highest 5 December, 2025

    37.9 °F

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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