Upper Sioux Agency State Park Weather Forecast

    • 59
    • 81

    Chance Rain Showers

    • 59
    • 80

    Rain Showers Likely

    • 57
    • 81

    Chance Rain Showers

    • 59
    • 84

    Slight Chance Thunderstorms

    • 61
    • 85

    Chance Thunderstorms

    • 58
    • 83

    Chance Rain Showers

    • 57
    • 82

    Chance Rain Showers

Today 30 May Yellow Medicine

Mostly cloudy with chance of Showers and slight chance of Thunderstorms. Near steady temperature in the upper 70s. Southeast Winds 15 to 20 Mph. Chance of precipitation 50 percent.

Tonight 30 May Yellow Medicine

Breezy. Mostly cloudy. Chance of Showers and slight chance of Thunderstorms in the Evening, then chance of Thunderstorms after midnight. Lows in the upper 50s. Southeast Winds 15 to 25 Mph. Chance of precipitation 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Upper Sioux Agency State Park Temperature Statistics

May Temperature

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

  • Lowest 5 May, 2026

    29.1 °F

  • Average May

    60.2 °F

  • Highest 25 May, 2026

    93.9 °F

Climate (2021–Present)

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

    48.2 °F

  • Average High 2021–2026

    58.7 °F
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