Sparta Weather Forecast

    • 67
    • 91

    Mostly Cloudy

    • 62
    • 82

    Chance Thunderstorms

    • 66
    • 86

    Slight Chance Thunderstorms

    • 61
    • 86

    Rain Showers Likely

    • 59
    • 77

    Chance Thunderstorms

    • 57
    • 77

    Slight Chance Thunderstorms

Today 13 Sep Knox

Partly sunny. Near steady temperature in the upper 80s. Southwest Winds 10 to 15 Mph.

Tonight 13 Sep Knox

Mostly cloudy. Lows in the upper 60s. South Winds 10 to 15 Mph.

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Sparta Temperature Statistics

September Temperature

Yankton, Chan Gurney Municipal Airport (34.8 miles)

  • Lowest 7 September, 2025

    41 °F

  • Average September

    63.5 °F

  • Highest 11 September, 2025

    84 °F

Climate (2020–Present)

Yankton, Chan Gurney Municipal Airport (34.8 miles)

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  • Average Low 2020–2025

    39 °F

  • Average 2020–2025

    50 °F

  • Average High 2020–2025

    61.2 °F
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