July in Cuernavaca is the rainiest and the cloudiest month of the year. In July, the weather in Cuernavaca is typically warm. Average daily high temperature in July is about 22 degrees above zero. On average, Cuernavaca has 29 rainy, 1 sunny, and 1 cloudy day in July. The rains are usually heavy. July as well as June, August, and September is considered the most uncomfortable time to visit Cuernavaca.