Steffan Reservoir Weather Forecast

    • 55
    • 62

    Chance Rain Showers

    • 56
    • 64

    Mostly Cloudy

    • 47
    • 66

    Rain Showers

    • 40
    • 51

    Chance Rain Showers

    • 39
    • 53

    Partly Sunny

    • 39
    • 51

    Partly Sunny

Today 31 Oct Knox

Mostly cloudy. Patchy fog early. A slight chance of Showers this morning. A chance of Showers this afternoon. Highs in the lower 60s. South Winds 10 to 15 Mph. Gusts up to 30 Mph this afternoon. Chance of rain 40 percent.

Tonight 31 Oct Knox

Showers likely. Lows in the mid 50s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 60 percent.

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  • Temperature Real-Time

Steffan Reservoir Temperature Statistics

October Temperature

Yankton, Chan Gurney Municipal Airport (11.2 miles)

  • Lowest 17 October, 2026

    33.1 °F

  • Average October

    57.6 °F

  • Highest 10 October, 2026

    91.9 °F

Climate (2021–2026)

Yankton, Chan Gurney Municipal Airport (11.2 miles)

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  • Average Low 2021–2026

    39.5 °F

  • Average 2021–2026

    50.6 °F

  • Average High 2021–2026

    61.8 °F
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