Upper Sioux Agency State Park Weather Forecast

    • 64
    • 87

    Patchy Smoke

    • 73
    • 89

    Chance Thunderstorms

    • 66
    • 93

    Mostly Sunny

    • 55
    • 81

    Mostly Sunny

    • 60
    • 80

    Mostly Sunny

    • 62
    • 84

    Partly Sunny

Today 18 Jul Yellow Medicine

Not as warm. Sunny. Highs in the mid 80s. Northeast Winds up to 10 Mph.

Tonight 18 Jul Yellow Medicine

Mostly clear. Lows in the mid 60s. Northeast Winds up to 5 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 2 July, 2026

    62.8 °F

  • Average July

    74.3 °F

  • Highest 14 July, 2026

    91 °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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