Upper Sioux Agency State Park Weather Forecast

    • 39
    • 59

    Chance Rain Showers

    • 31
    • 53

    Sunny

    • 43
    • 63

    Mostly Sunny

    • 42
    • 70

    Partly Sunny

    • 44
    • 69

    Mostly Sunny

Today 15 Oct Yellow Medicine

Cloudy. Chance of rain Showers early in the Morning, then rain Showers likely late in the morning. Chance of rain Showers early in the afternoon. Highs in the upper 50s. Northwest Winds up to 5 Mph with Gusts to around 20 Mph increasing to 10 to 15 Mph with Gusts to around 35 Mph in the afternoon. Chance of Showers 70 percent.

Tonight 15 Oct Yellow Medicine

Windy. Mostly cloudy. A 40 percent chance of rain Showers after midnight. Lows in the upper 30s. Northwest Winds 20 to 30 Mph with Gusts to around 45 Mph.

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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 2 October, 2026

    34.9 °F

  • Average October

    61 °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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