July in Zacatecas is the rainiest month of the year. In July, the weather in Zacatecas is typically warm. Average daily high temperature in July is about 22 degrees above zero. On average, Zacatecas has 22 rainy, 5 sunny, 3 partly cloudy, and 1 cloudy day in July. The rains are usually heavy. July as well as August and September is considered the most uncomfortable time to visit Zacatecas.