July in Santiago de Querétaro is the rainiest month of the year. In July, the weather in Santiago de Querétaro is typically warm. Average daily high temperature in July is about 21 degrees above zero. On average, Santiago de Querétaro has 25 rainy, 3 sunny, 2 cloudy, and 1 partly cloudy day in July. The rains are usually heavy. July as well as August and September is considered the most uncomfortable time to visit Santiago de Querétaro.