Upper Sioux Agency State Park Weather Forecast

    • 41
    • 73

    Becoming Sunny

    • 43
    • 66

    Mostly Sunny

    • 49
    • 71

    Mostly Sunny

    • 50
    • 74

    Partly Sunny

    • 55
    • 79

    Partly Sunny

    • 58
    • 80

    Mostly Cloudy

Today 18 Oct Yellow Medicine

Sunny. Highs in the lower 70s. Southwest Winds 5 to 15 Mph. Gusts up to 35 Mph early in the morning.

Tonight 18 Oct Yellow Medicine

Clear. Lows in the lower 40s. West Winds up to 5 Mph shifting to the northwest after midnight.

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Upper Sioux Agency State Park Temperature Statistics

October Temperature

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

  • Lowest 16 October, 2026

    30.9 °F

  • Average October

    57.9 °F

  • Highest 10 October, 2026

    92.1 °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

    37.5 °F

  • Average 2021–2026

    48 °F

  • Average High 2021–2026

    58.4 °F
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