Big Sioux Weather Forecast

    • 61
    • 85

    Sunny

    • 62
    • 89

    Chance Thunderstorms

    • 61
    • 78

    Rain Showers

    • 60
    • 74

    Rain Showers Likely

    • 58
    • 72

    Chance Thunderstorms

    • 56
    • 73

    Slight Chance Rain Showers

Today 15 Sep Minnehaha

Sunny. Highs in the lower 80s. South Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 15 Sep Minnehaha

Mostly clear. Lows in the lower 60s. South Winds 10 to 15 Mph.

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Big Sioux Temperature Statistics

September Temperature

Sioux Falls, Foss Field (7.5 miles)

  • Lowest 7 September, 2025

    36 °F

  • Average September

    64.3 °F

  • Highest 13 September, 2025

    90 °F

Climate (2020–Present)

Sioux Falls, Foss Field (7.5 miles)

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  • Average Low 2020–2025

    38.8 °F

  • Average 2020–2025

    49.8 °F

  • Average High 2020–2025

    60.6 °F
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