Steffan Reservoir Weather Forecast

    • 61
    • 88

    Mostly Sunny

    • 51
    • 80

    Mostly Sunny

    • 51
    • 76

    Partly Sunny

    • 55
    • 81

    Partly Sunny

    • 60
    • 83

    Mostly Cloudy

    • 59
    • 89

    Chance Rain Showers

Today 12 Jun Knox

Sunny, warmer with Highs in the upper 80s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 12 Jun Knox

Mostly clear. Lows around 60. South Winds 15 to 20 Mph with Gusts up to 30 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Steffan Reservoir Temperature Statistics

June Temperature

Yankton, Chan Gurney Municipal Airport (11.2 miles)

  • Lowest 1 June, 2026

    60.1 °F

  • Average June

    75.4 °F

  • Highest 9 June, 2026

    95 °F

Climate (2021–Present)

Yankton, Chan Gurney Municipal Airport (11.2 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    39.3 °F

  • Average 2021–2026

    50.5 °F

  • Average High 2021–2026

    61.8 °F
Get WillyWeather+ to remove ads