Upper Sioux Agency State Park Weather Forecast

    • 63
    • 81

    Slight Chance Thunderstorms

    • 61
    • 81

    Chance Thunderstorms

    • 61
    • 80

    Partly Sunny

    • 61
    • 79

    Slight Chance Thunderstorms

    • 57
    • 77

    Partly Sunny

    • 57
    • 74

    Partly Sunny

Today 8 Aug Yellow Medicine

Partly sunny in the morning then clearing. Highs in the lower 80s. South Winds 5 to 15 Mph.

Tonight 8 Aug Yellow Medicine

Partly cloudy. Lows in the lower 60s. South Winds 5 to 15 Mph.

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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 5 August, 2026

    50.5 °F

  • Average August

    71.3 °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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