Upper Sioux Agency State Park Weather Forecast

    • 63
    • 82

    Chance Rain Showers

    • 62
    • 81

    Slight Chance Thunderstorms

    • 59
    • 79

    Mostly Cloudy

    • 57
    • 74

    Partly Sunny

    • 58
    • 75

    Chance Rain Showers

    • 58
    • 74

    Slight Chance Rain Showers

Today 10 Aug Yellow Medicine

Partly sunny. Highs in the mid 80s. East Winds up to 10 Mph.

Tonight 10 Aug Yellow Medicine

Mostly cloudy. Lows around 60. North 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

    70.5 °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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