July in Umm al-Quwain is the cloudiest and the hottest month of the year. In July, the weather in Umm al-Quwain is typically hot. Average daily high temperature in July is about 40 degrees above zero. On average, Umm al-Quwain has 21 sunny and 10 partly cloudy days in July. July as well as June, August, and September is considered the most uncomfortable time to visit Umm al-Quwain.