Upper Sioux Agency State Park Weather Forecast

    • 73
    • 93

    Mostly Sunny

    • 72
    • 96

    Slight Chance Thunderstorms

    • 68
    • 93

    Mostly Sunny

    • 67
    • 91

    Mostly Sunny

    • 69
    • 92

    Mostly Sunny

Today 25 Jul Yellow Medicine

Warmer, sunny. Highs in the mid 90s. Southeast Winds up to 10 Mph.

Tonight 25 Jul Yellow Medicine

Partly cloudy in the Evening, then mostly cloudy with a 20 percent chance of Thunderstorms after midnight. Lows in the lower 70s. Southeast Winds 5 to 10 Mph shifting to the south after midnight.

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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

    74.1 °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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