July in Santiago de Querétaro is the rainiest and the cloudiest month of the year. In July, the weather in Santiago de Querétaro is typically warm. Average daily high temperature in July is about 26 degrees above zero. On average, Santiago de Querétaro has 17 rainy, 8 partly cloudy, 5 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 Santiago de Querétaro.