Hartington Weather Forecast

    • 71
    • 94

    Chance Thunderstorms

    • 70
    • 88

    Chance Thunderstorms

    • 74
    • 90

    Chance Thunderstorms

    • 63
    • 88

    Partly Sunny

    • 61
    • 82

    Slight Chance Rain Showers

    • 64
    • 84

    Partly Sunny

Today 5 Sep Cedar

Partly sunny early this Morning, then becoming mostly sunny. A chance of Showers with a slight chance of Thunderstorms early this Morning, then a slight chance of Showers this afternoon. Humid with Highs in the lower 90s. Southeast Winds around 5 Mph, becoming east this Morning, then becoming southeast with Gusts up to 20 Mph this afternoon. Chance of rain 50 percent. Heat index Values up to 102 this afternoon.

Tonight 5 Sep Cedar

Partly cloudy in the Evening, then mostly cloudy with a chance of Showers with a slight chance of Thunderstorms after midnight. Humid with Lows in the lower 70s. Southeast Winds 5 to 10 Mph. Chance of rain 40 percent.

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Hartington Temperature Statistics

September Temperature

Yankton, Chan Gurney Municipal Airport (21.1 miles)

  • Lowest 2 September, 2026

    66.9 °F

  • Average September

    77.6 °F

  • Highest 2 September, 2026

    91.9 °F

Climate (2021–2026)

Yankton, Chan Gurney Municipal Airport (21.1 miles)

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  • Average Low 2021–2026

    39.3 °F

  • Average 2021–2026

    50.5 °F

  • Average High 2021–2026

    61.8 °F
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