South Sioux City Weather Forecast

Today 4 Aug Dakota

Mostly cloudy with a chance of Showers and Thunderstorms. Patchy smoke. Not as warm. Near steady temperature in the mid 60s. North Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

Tonight 4 Aug Dakota

Mostly cloudy. A chance of Showers and Thunderstorms this evening. Patchy smoke. Lows in the lower 50s. North Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Sioux City Temperature Statistics

August Temperature

Sioux City, Sioux Gateway Airport (4.3 miles)

  • Lowest 2 August, 2026

    57.9 °F

  • Average August

    72.5 °F

  • Highest 1 August, 2026

    85.6 °F

Climate (2021–2026)

Sioux City, Sioux Gateway Airport (4.3 miles)

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  • Average Low 2021–2026

    39.1 °F

  • Average 2021–2026

    51.2 °F

  • Average High 2021–2026

    63.4 °F
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