Steffan Reservoir Weather Forecast

    • 38
    • 81

    Breezy

    • 41
    • 63

    Rain Showers Likely

    • 44
    • 58

    Rain Showers Likely

    • 46
    • 63

    Rain Showers

    • 36
    • 56

    Chance Rain Showers

    • 36
    • 57

    Partly Sunny

    • 36
    • 60

    Slight Chance Rain Showers

Today 23 Apr Knox

Mostly sunny and breezy. Highs around 80. West Winds 15 to 25 Mph with Gusts up to 35 Mph.

Tonight 23 Apr Knox

Partly cloudy in the Evening, then becoming mostly clear. Breezy and much cooler with Lows in the upper 30s. Northwest Winds 15 to 25 Mph with Gusts up to 40 Mph, Diminishing to 10 to 15 Mph with Gusts up to 30 Mph after midnight.

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  • Temperature Real-Time

Steffan Reservoir Temperature Statistics

April Temperature

Yankton, Chan Gurney Municipal Airport (11.2 miles)

  • Lowest 10 April, 2026

    23 °F

  • Average April

    47 °F

  • Highest 16 April, 2026

    87.1 °F

Climate (2021–Present)

Yankton, Chan Gurney Municipal Airport (11.2 miles)

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  • Average Low 2021–2026

    39.3 °F

  • Average 2021–2026

    50.5 °F

  • Average High 2021–2026

    61.8 °F
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