Steffan Reservoir Weather Forecast

    • 43
    • 62

    Rain Showers Likely

    • 40
    • 55

    Rain Showers

    • 41
    • 54

    Rain Showers

    • 46
    • 59

    Chance Rain Showers

    • 41
    • 62

    Mostly Sunny

    • 47
    • 63

    Partly Sunny

Today 24 Oct Knox

A slight chance of Thunderstorms early this morning. Mostly cloudy with a chance of Showers. Breezy and much cooler with Highs in the lower 60s. South Winds 20 to 25 Mph, becoming northwest 15 to 20 Mph this afternoon. Chance of rain 50 percent.

Tonight 24 Oct Knox

Showers likely. Much cooler with Lows in the lower 40s. North Winds 5 to 10 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • 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

    58.6 °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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