Dakota Dunes Weather Forecast
- 63
- 88
Increasing Clouds
- 61
- 79
Rain Showers
- 59
- 75
Rain Showers Likely
- 55
- 73
Chance Rain Showers
- 58
- 76
Slight Chance Thunderstorms
- 59
- 80
Partly Sunny
Today 16 Sep Union
Sunny. Highs in the upper 80s. South Winds 5 to 10 Mph.
Tonight 16 Sep Union
Partly cloudy in the Evening, then becoming mostly cloudy. A chance of Showers and Thunderstorms. Humid with Lows in the lower 60s. Southeast Winds 5 to 10 Mph, becoming southwest after midnight. Chance of rain 50 percent.
Dakota Dunes Temperature Statistics
September Temperature
Sioux City, Sioux Gateway Airport (7.5 miles)
Lowest 7 September, 2025
37.9 °FAverage September
64.6 °FHighest 13 September, 2025
91.9 °F
Climate (2020–Present)
Sioux City, Sioux Gateway Airport (7.5 miles)
Average Low 2020–2025
38.8 °FAverage 2020–2025
50.7 °FAverage High 2020–2025
62.6 °F