Upper Sioux Agency State Park Weather Forecast

    • 34
    • 52

    Increasing Clouds

    • 37
    • 62

    Partly Sunny

    • 45
    • 71

    Partly Sunny

    • 38
    • 67

    Mostly Cloudy

    • 36
    • 61

    Partly Sunny

    • 45
    • 70

    Partly Sunny

Today 6 May Yellow Medicine

Mostly cloudy. Highs in the lower 50s. Northwest Winds 10 to 15 Mph.

Tonight 6 May Yellow Medicine

Mostly cloudy. Areas of frost after midnight. Lows in the mid 30s. West Winds up to 10 Mph.

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Upper Sioux Agency State Park Temperature Statistics

May Temperature

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

  • Lowest 2 May, 2026

    32 °F

  • Average May

    53.8 °F

  • Highest 3 May, 2026

    72.1 °F

Climate (2021–Present)

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

    48.1 °F

  • Average High 2021–2026

    58.7 °F
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