Missouri National Recreation River Weather Forecast

    • 59
    • 71

    Rain Showers Likely

    • 56
    • 72

    Chance Rain Showers

    • 58
    • 72

    Slight Chance Thunderstorms

    • 60
    • 78

    Partly Sunny

    • 61
    • 80

    Partly Sunny

    • 55
    • 79

    Mostly Sunny

    • 55
    • 78

    Mostly Sunny

Today 17 Sep Knox

Showers likely with a chance of Thunderstorms. Not as warm. Near steady temperature in the upper 60s. South Winds 5 to 10 Mph. Chance of rain 60 percent.

Tonight 17 Sep Knox

Mostly cloudy. A chance of Showers and Thunderstorms this Evening, then a slight chance of Showers after midnight. Lows in the upper 50s. South Winds around 5 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Missouri National Recreation River Temperature Statistics

September Temperature

Yankton, Chan Gurney Municipal Airport (13.7 miles)

  • Lowest 7 September, 2025

    41 °F

  • Average September

    66.4 °F

  • Highest 13 September, 2025

    88 °F

Climate (2020–Present)

Yankton, Chan Gurney Municipal Airport (13.7 miles)

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  • Average Low 2020–2025

    39.1 °F

  • Average 2020–2025

    50 °F

  • Average High 2020–2025

    61.2 °F
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