Upper Sioux Agency State Park Weather Forecast

    • 60
    • 70

    Rain Showers

    • 58
    • 81

    Sunny

    • 60
    • 79

    Mostly Sunny

    • 61
    • 82

    Chance Thunderstorms

    • 53
    • 72

    Slight Chance Rain Showers

    • 56
    • 73

    Partly Sunny

    • 61
    • 78

    Mostly Sunny

Today 31 Jul Yellow Medicine

Cooler, cloudy. Chance of Showers and slight chance of Thunderstorms early in the Afternoon, then chance of Showers late in the afternoon. Near steady temperature in the upper 60s. North Winds 10 to 15 Mph. Chance of precipitation 50 percent.

Tonight 31 Jul Yellow Medicine

Mostly cloudy until early morning then clearing. Lows around 60. North Winds up to 10 Mph.

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Upper Sioux Agency State Park Temperature Statistics

July Temperature

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

  • Lowest 23 July, 2026

    50.9 °F

  • Average July

    75.9 °F

  • Highest 17 July, 2026

    94.3 °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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