Upper Sioux Agency State Park Weather Forecast

    • 57
    • 78

    Decreasing Clouds

    • 63
    • 82

    Mostly Sunny

    • 55
    • 78

    Chance Rain Showers

    • 59
    • 81

    Mostly Sunny

    • 61
    • 81

    Chance Thunderstorms

    • 59
    • 78

    Partly Sunny

    • 59
    • 78

    Partly Sunny

Today 5 Aug Yellow Medicine

Sunny. Highs in the upper 70s. Southwest Winds up to 10 Mph.

Tonight 5 Aug Yellow Medicine

Mostly clear. Lows in the upper 50s. South Winds 5 to 15 Mph. Gusts up to 30 Mph after midnight.

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Upper Sioux Agency State Park Temperature Statistics

August Temperature

Granite Falls, Granite Falls Municipal Airport/Lenzen-Roe Memorial Field (5.6 miles)

  • Lowest 1 August, 2026

    61.5 °F

  • Average August

    75.2 °F

  • Highest 3 August, 2026

    85.1 °F

Climate (2021–2026)

Granite Falls, Granite Falls Municipal Airport/Lenzen-Roe Memorial Field (5.6 miles)

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  • Average Low 2021–2026

    37.4 °F

  • Average 2021–2026

    48 °F

  • Average High 2021–2026

    58.5 °F
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