July in Willcox is the rainiest and the cloudiest month of the year. In July, the weather in Willcox is typically hot. Average daily high temperature in July is about 29 degrees above zero. On average, Willcox has 19 rainy, 6 sunny, 4 partly cloudy, and 2 cloudy days in July. The rains are usually heavy. July as well as August is considered the most uncomfortable time to visit Willcox.