South Sioux City Weather Forecast
- 74
- 91
Decreasing Clouds
- 68
- 94
Chance Thunderstorms
- 68
- 84
Chance Thunderstorms
- 68
- 88
Slight Chance Thunderstorms
- 71
- 92
Slight Chance Thunderstorms
- 72
- 95
Slight Chance Thunderstorms
Today 22 Jul Dakota
Mostly sunny. A slight chance of Showers and Thunderstorms this afternoon. Highs in the lower 90s. South Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 20 percent. Heat index Values up to 106 this afternoon.
Tonight 22 Jul Dakota
Mostly clear. Humid with Lows in the lower 70s. South Winds 15 to 20 Mph. Heat index Values up to 105 early in the evening.
South Sioux City Temperature Statistics
July Temperature
Sioux City, Sioux Gateway Airport (4.3 miles)
Lowest 17 July, 2025
56.6 °FAverage July
75.1 °FHighest 3 July, 2025
93.7 °F
Climate (2020–Present)
Sioux City, Sioux Gateway Airport (4.3 miles)
Average Low 2020–2025
38.7 °FAverage 2020–2025
50.6 °FAverage High 2020–2025
62.6 °F