Upper Sioux Agency State Park Weather Forecast

    • 64
    • 83

    Increasing Clouds

    • 61
    • 79

    Chance Rain Showers

    • 63
    • 79

    Chance Thunderstorms

    • 60
    • 78

    Chance Thunderstorms

    • 57
    • 75

    Partly Sunny

    • 61
    • 79

    Partly Sunny

Today 12 Aug Yellow Medicine

Mostly sunny. Areas of fog in the morning. Highs in the lower 80s. East Winds up to 10 Mph.

Tonight 12 Aug Yellow Medicine

Mostly cloudy. Near steady temperature in the upper 60s. Northeast Winds up to 5 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

    70.9 °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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