July in San Miguel de Allende is the rainiest and the cloudiest month of the year. In July, the weather in San Miguel de Allende is typically warm. Average daily high temperature in July is about 26 degrees above zero. On average, San Miguel de Allende has 16 rainy, 8 partly cloudy, 6 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 San Miguel de Allende.