Upper Sioux Agency State Park Weather Forecast

    • 48
    • 57

    Increasing Clouds

    • 52
    • 61

    Chance Rain Showers

    • 52
    • 63

    Mostly Cloudy

    • 52
    • 60

    Rain

    • 44
    • 57

    Rain Likely

    • 41
    • 52

    Chance Rain

    • 36
    • 49

    Slight Chance Rain

Today 30 Oct Yellow Medicine

Mostly sunny. Highs in the upper 40s.

Tonight 30 Oct Yellow Medicine

Not as cool. Mostly cloudy. Chance of rain and slight chance of Thunderstorms after midnight. Lows in the upper 40s. Southeast Winds 5 to 10 Mph. Chance of precipitation 50 percent.

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Upper Sioux Agency State Park Temperature Statistics

October Temperature

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

  • Lowest 17 October, 2026

    30.7 °F

  • Average October

    55.8 °F

  • Highest 10 October, 2026

    92.1 °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

    58.4 °F
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