Upper Sioux Agency State Park Weather Forecast

    • 64
    • 85

    Chance Thunderstorms

    • 66
    • 86

    Mostly Sunny

    • 69
    • 88

    Slight Chance Thunderstorms

    • 69
    • 89

    Chance Rain Showers

    • 64
    • 84

    Chance Thunderstorms

    • 62
    • 81

    Partly Sunny

    • 64
    • 84

    Partly Sunny

Today 4 Jul Yellow Medicine

Mostly sunny with a 20 percent chance of Thunderstorms. Near steady temperature in the lower 80s. North Winds up to 5 Mph.

Tonight 4 Jul Yellow Medicine

Partly cloudy then becoming mostly cloudy after midnight then becoming partly cloudy. Chance of Thunderstorms in the Evening, then slight chance of Thunderstorms after midnight. Lows in the lower 60s. East Winds up to 5 Mph. Chance of Thunderstorms 40 percent.

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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

    69.3 °F

  • Highest 2 July, 2026

    76.5 °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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