Upper Sioux Agency State Park Weather Forecast

    • 49
    • 72

    Patchy Smoke

    • 58
    • 78

    Mostly Sunny

    • 63
    • 82

    Mostly Sunny

    • 56
    • 80

    Mostly Sunny

    • 60
    • 81

    Chance Thunderstorms

    • 63
    • 82

    Slight Chance Thunderstorms

    • 59
    • 77

    Slight Chance Thunderstorms

Today 4 Aug Yellow Medicine

Cooler. Partly sunny. Near steady temperature around 70. Northwest Winds up to 10 Mph.

Tonight 4 Aug Yellow Medicine

Mostly clear. Lows around 50. Southwest Winds up to 10 Mph.

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Upper Sioux Agency State Park Temperature Statistics

August Temperature

Granite Falls, Granite Falls Municipal Airport/Lenzen-Roe Memorial Field (5.6 miles)

  • Lowest 1 August, 2026

    61.5 °F

  • Average August

    74.9 °F

  • Highest 2 August, 2026

    84.2 °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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