Upper Sioux Agency State Park Weather Forecast

    • 69
    • 89

    Rain Showers Likely

    • 64
    • 80

    Chance Thunderstorms

    • 62
    • 82

    Partly Sunny

    • 65
    • 86

    Mostly Sunny

    • 68
    • 89

    Mostly Sunny

    • 71
    • 93

    Mostly Sunny

    • 72
    • 95

    Mostly Sunny

Today 7 Jul Yellow Medicine

Mostly sunny with a 50 percent chance of Thunderstorms. Highs in the upper 80s. East Winds 5 to 15 Mph.

Tonight 7 Jul Yellow Medicine

Mostly cloudy. Slight chance of Thunderstorms early in the Evening, then chance of Thunderstorms after midnight. Showers likely early in the morning. Lows in the upper 60s. South Winds 5 to 15 Mph. Chance of precipitation 70 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

    71 °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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