Steffan Reservoir Weather Forecast

    • 24
    • 34

    Increasing Clouds

    • 20
    • 53

    Mostly Cloudy

    • 24
    • 44

    Chance Rain/Snow

    • 34
    • 54

    Mostly Sunny

    • 21
    • 62

    Partly Sunny

    • 14
    • 35

    Mostly Cloudy

Today 23 Feb Knox

Mostly sunny. Not as cool with Highs in the mid 30s. East Winds around 5 Mph, increasing to south 15 to 20 Mph with Gusts up to 30 Mph. Wind chill Values as low as 10 below early this morning.

Tonight 23 Feb Knox

Partly cloudy in the Evening, then becoming mostly cloudy. Not as cool with Lows in the mid 20s. Temperature rising into the lower 30s after midnight. South Winds 15 to 20 Mph.

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  • Temperature Real-Time

Steffan Reservoir Temperature Statistics

February Temperature

Yankton, Chan Gurney Municipal Airport (11.2 miles)

  • Lowest 20 February, 2026

    7 °F

  • Average February

    35.9 °F

  • Highest 17 February, 2026

    70 °F

Climate (2021–Present)

Yankton, Chan Gurney Municipal Airport (11.2 miles)

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  • Average Low 2021–2026

    39.4 °F

  • Average 2021–2026

    50.5 °F

  • Average High 2021–2026

    61.8 °F
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