July in Tucson is the rainiest and the cloudiest month of the year. In July, the weather in Tucson is typically hot. Average daily high temperature in July is about 32 degrees above zero. On average, Tucson has 11 partly cloudy, 8 sunny, 6 rainy, and 6 cloudy days in July. The rains are usually heavy. July as well as June is considered the most uncomfortable time to visit Tucson.