July in Mecca is the windiest and the cloudiest month of the year. In July, the weather in Mecca is typically hot. Average daily high temperature in July is about 39 degrees above zero. On average, Mecca has 17 partly cloudy, 13 sunny, and 1 cloudy day in July. July as well as May, June, August, and September is considered the most uncomfortable time to visit Mecca.