Dakota Dunes Weather Forecast
- 64
- 86
Chance Rain Showers
- 63
- 87
Mostly Sunny
- 61
- 88
Rain Showers Likely
- 57
- 77
Chance Thunderstorms
- 55
- 75
Chance Rain Showers
- 53
- 75
Partly Sunny
Today 14 Sep Union
Partly sunny this Morning, then mostly cloudy with a chance of Showers with a slight chance of Thunderstorms this afternoon. Highs in the mid 80s. Temperature falling into the lower 80s this afternoon. South Winds 15 to 20 Mph. Chance of rain 40 percent.
Tonight 14 Sep Union
Mostly cloudy with a chance of Showers and Thunderstorms in the Evening, then partly cloudy with a slight chance of Showers and Thunderstorms after midnight. Humid with Lows in the lower 60s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. 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
61.9 °FHighest 11 September, 2025
84.9 °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