Upper Sioux Agency State Park Weather Forecast

    • 69
    • 94

    Partly Sunny

    • 69
    • 90

    Mostly Sunny

    • 70
    • 92

    Chance Rain Showers

    • 66
    • 89

    Chance Thunderstorms

    • 64
    • 81

    Mostly Sunny

    • 63
    • 83

    Mostly Sunny

Today 27 Jul Yellow Medicine

Sunny. Patchy smoke. Highs in the mid 90s. North Winds 10 to 15 Mph.

Tonight 27 Jul Yellow Medicine

Increasing Clouds. Patchy smoke. Lows around 70. North Winds up to 10 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 23 July, 2026

    50.9 °F

  • Average July

    74.4 °F

  • Highest 17 July, 2026

    94.3 °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

    37.4 °F

  • Average 2021–2026

    48 °F

  • Average High 2021–2026

    58.5 °F
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