In July, Sioux City typically sees daytime highs of 30.8°C and overnight lows around 17.1°C. Compared to the annual average high of 15.8°C, July runs +15.0°C.
July in Sioux City averages a daytime high of 30.8°C and an overnight low of 17.1°C.
July runs +15.0°C compared to Sioux City's annual average high of 15.8°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 30.8°C and cooler evenings around 17.1°C.