Upper Sioux Agency State Park Weather Forecast
- 51
- 78
Mostly Sunny
- 59
- 79
Chance Rain Showers
- 62
- 79
Slight Chance Thunderstorms
- 61
- 84
Partly Sunny
- 57
- 81
Mostly Sunny
- 58
- 81
Partly Sunny
Today 22 Aug Yellow Medicine
Sunny. Near steady temperature in the upper 70s. North Winds 5 to 10 Mph.
Tonight 22 Aug Yellow Medicine
Increasing Clouds. Lows in the lower 50s. North Winds up to 10 Mph shifting to the south after midnight.
Upper Sioux Agency State Park Temperature Statistics
August Temperature
Granite Falls, Granite Falls Municipal Airport/Lenzen-Roe Memorial Field (5.6 miles)
Lowest 5 August, 2026
50.5 °FAverage August
71.6 °FHighest 12 August, 2026
85.3 °F
Climate (2021–2026)
Granite Falls, Granite Falls Municipal Airport/Lenzen-Roe Memorial Field (5.6 miles)
Average Low 2021–2026
37.4 °FAverage 2021–2026
48 °FAverage High 2021–2026
58.4 °F