Upper Sioux Agency State Park Weather Forecast
- 53
- 73
Rain Showers
- 51
- 72
Mostly Sunny
- 54
- 78
Slight Chance Thunderstorms
- 58
- 79
Chance Rain Showers
- 54
- 75
Chance Rain Showers
- 56
- 77
Partly Sunny
Today 17 Jun Yellow Medicine
Breezy. Mostly cloudy then becoming mostly sunny late in the morning then becoming partly sunny. Chance of rain Showers and slight chance of Thunderstorms early in the Morning, then chance of Thunderstorms in the afternoon. Rain Showers late in the afternoon. Highs in the lower 70s. South Winds 5 to 15 Mph shifting to the west with Gusts to around 30 Mph in the Morning, then increasing to northwest 15 to 25 Mph in the afternoon. Chance of precipitation 90 percent.
Tonight 17 Jun Yellow Medicine
Breezy. Mostly cloudy with a 30 percent chance of Thunderstorms in the Evening, then partly cloudy after midnight. Lows in the lower 50s. Northwest Winds 15 to 25 Mph decreasing to 10 to 15 Mph after midnight.
Upper Sioux Agency State Park Temperature Statistics
June Temperature
Granite Falls, Granite Falls Municipal Airport/Lenzen-Roe Memorial Field (5.6 miles)
Lowest 14 June, 2026
52.3 °FAverage June
72.7 °FHighest 9 June, 2026
92.8 °F
Climate (2021–2026)
Granite Falls, Granite Falls Municipal Airport/Lenzen-Roe Memorial Field (5.6 miles)
Average Low 2021–2026
37.5 °FAverage 2021–2026
48.1 °FAverage High 2021–2026
58.6 °F