Upper Sioux Agency State Park Weather Forecast

    • 68
    • 90

    Increasing Clouds

    • 70
    • 89

    Rain Showers Likely

    • 63
    • 84

    Rain Showers Likely

    • 62
    • 83

    Partly Sunny

    • 65
    • 86

    Partly Sunny

    • 69
    • 89

    Mostly Sunny

    • 72
    • 93

    Mostly Sunny

Today 6 Jul Yellow Medicine

Sunny. Near steady temperature in the upper 80s. South Winds 10 to 15 Mph.

Tonight 6 Jul Yellow Medicine

Mostly cloudy with a 40 percent chance of Thunderstorms until early Morning, then mostly cloudy late in the night. Some Thunderstorms may produce heavy rainfall until early morning. Lows in the upper 60s. South Winds 5 to 15 Mph.

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Upper Sioux Agency State Park Temperature Statistics

July Temperature

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

  • Lowest 2 July, 2026

    62.8 °F

  • Average July

    71.5 °F

  • Highest 4 July, 2026

    76.8 °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

    58.6 °F
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