Fort Pierre Weather Forecast

    • 53
    • 63

    Rain Showers

    • 50
    • 69

    Partly Sunny

    • 55
    • 76

    Slight Chance Thunderstorms

    • 56
    • 82

    Mostly Sunny

    • 52
    • 74

    Slight Chance Thunderstorms

    • 51
    • 75

    Mostly Sunny

Today 18 Sep Stanley

A slight chance of Thunderstorms. Showers. Patchy fog. Near steady temperature in the upper 50s. North Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain near 100 percent.

Tonight 18 Sep Stanley

Mostly cloudy with a 20 percent chance of Showers. Patchy fog. Lows in the lower 50s. Northwest Winds 10 to 15 Mph.

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Fort Pierre Temperature Statistics

September Temperature

Pierre, Pierre Regional Airport (4.3 miles)

  • Lowest 6 September, 2025

    39 °F

  • Average September

    66.5 °F

  • Highest 12 September, 2025

    90 °F

Climate (2020–Present)

Pierre, Pierre Regional Airport (4.3 miles)

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  • Average Low 2020–2025

    36.8 °F

  • Average 2020–2025

    48.7 °F

  • Average High 2020–2025

    61.3 °F
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