Steffan Reservoir Weather Forecast

    • 60
    • 77

    Chance Thunderstorms

    • 62
    • 79

    Rain Showers

    • 65
    • 85

    Slight Chance Thunderstorms

    • 56
    • 83

    Chance Thunderstorms

    • 58
    • 82

    Mostly Sunny

    • 57
    • 79

    Mostly Sunny

Today 1 Jun Knox

Mostly sunny. Highs in the upper 70s. East Winds 5 to 10 Mph.

Tonight 1 Jun Knox

Partly cloudy in the Evening, then mostly cloudy with a chance of Showers and Thunderstorms after midnight. Lows in the lower 60s. Southeast Winds 5 to 10 Mph. Chance of rain 50 percent.

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Steffan Reservoir Temperature Statistics

June Temperature

Yankton, Chan Gurney Municipal Airport (11.2 miles)

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  • Average June

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Climate (2019–Present)

Yankton, Chan Gurney Municipal Airport (11.2 miles)

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  • Average Low 2019–2024

    39.2 °F

  • Average 2019–2024

    49.7 °F

  • Average High 2019–2024

    60.6 °F
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