Upper Sioux Agency State Park Weather Forecast

    • 55
    • 78

    Chance Rain Showers

    • 43
    • 64

    Mostly Sunny

    • 46
    • 61

    Mostly Sunny

    • 46
    • 63

    Partly Sunny

    • 41
    • 61

    Partly Sunny

Today 30 Sep Yellow Medicine

Mostly sunny. Patchy fog in the morning. Highs in the upper 70s. Southwest Winds up to 10 Mph.

Tonight 30 Sep Yellow Medicine

Mostly cloudy. Lows in the mid 50s. West Winds up to 10 Mph shifting to the northwest after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Upper Sioux Agency State Park Temperature Statistics

September Temperature

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

  • Lowest 16 September, 2026

    44.6 °F

  • Average September

    66.3 °F

  • Highest 3 September, 2026

    92.8 °F

Climate (2021–2026)

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

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    37.5 °F

  • Average 2021–2026

    48 °F

  • Average High 2021–2026

    58.4 °F
Get WillyWeather+ to remove ads