Steffan Reservoir Weather Forecast

    • 65
    • 87

    Chance Thunderstorms

    • 70
    • 92

    Slight Chance Thunderstorms

    • 74
    • 94

    Mostly Sunny

    • 70
    • 92

    Rain Showers Likely

    • 63
    • 89

    Chance Thunderstorms

    • 62
    • 84

    Chance Thunderstorms

    • 66
    • 85

    Chance Thunderstorms

Today 1 Jul Knox

Sunny. Near steady temperature in the mid 80s. South Winds 5 to 10 Mph.

Tonight 1 Jul Knox

Mostly clear this Evening, then partly cloudy with a chance of Showers and Thunderstorms after midnight. Lows in the mid 60s. South Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Steffan Reservoir Temperature Statistics

July Temperature

Yankton, Chan Gurney Municipal Airport (11.2 miles)

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  • Average July

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Climate (2020–Present)

Yankton, Chan Gurney Municipal Airport (11.2 miles)

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  • Average Low 2020–2025

    39 °F

  • Average 2020–2025

    50 °F

  • Average High 2020–2025

    61.3 °F
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