Upper Sioux Agency State Park Weather Forecast

    • 50
    • 72

    Mostly Sunny

    • 50
    • 73

    Mostly Sunny

    • 54
    • 78

    Partly Sunny

    • 55
    • 76

    Chance Thunderstorms

    • 53
    • 76

    Rain Showers Likely

    • 53
    • 74

    Mostly Sunny

Today 13 Jun Yellow Medicine

Cooler. Mostly sunny then becoming sunny in the late morning and early afternoon then becoming mostly sunny. Highs in the lower 70s. Northwest Winds 5 to 15 Mph increasing to 15 to 20 Mph in the afternoon.

Tonight 13 Jun Yellow Medicine

Partly cloudy. Lows in the upper 40s. Northwest Winds 10 to 20 Mph.

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Upper Sioux Agency State Park Temperature Statistics

June Temperature

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

  • Lowest 1 June, 2026

    62.1 °F

  • Average June

    76 °F

  • Highest 9 June, 2026

    92.8 °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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