July in Navojoa is the rainiest and the cloudiest month of the year. In July, the weather in Navojoa is typically hot. Average daily high temperature in July is about 34 degrees above zero. On average, Navojoa has 21 rainy, 6 sunny, and 4 partly cloudy days in July. The rains are usually heavy. July as well as August is considered the most uncomfortable time to visit Navojoa.