Upper Sioux Agency State Park Weather Forecast

    • -5
    • 19

    Blowing Snow

    • -4
    • 9

    Cold

    • 11
    • 19

    Mostly Cloudy

    • 3
    • 20

    Mostly Cloudy

    • 0
    • 20

    Mostly Cloudy

    • -12
    • 9

    Cold

Today 18 Jan Yellow Medicine

Windy. Mostly cloudy with a 50 percent chance of snow. Blowing snow. Visibility one quarter mile or less at Times. Highs around 16. Temperatures falling into the mid single Digits in the afternoon. West Winds 15 to 25 Mph increasing to northwest 25 to 35 Mph in the afternoon. Gusts up to 50 Mph.

Tonight 18 Jan Yellow Medicine

Windy. Decreasing Clouds. Patchy blowing snow through the night. Lows around 4 below. Northwest Winds 20 to 30 Mph with Gusts to around 45 Mph decreasing to 10 to 20 Mph with Gusts to around 35 Mph after midnight.

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Upper Sioux Agency State Park Temperature Statistics

January Temperature

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

  • Lowest 6 January, 2026

    31.1 °F

  • Average January

    34.5 °F

  • Highest 15 January, 2026

    40.1 °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

    48.1 °F

  • Average High 2021–2026

    58.5 °F
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