July in Dayr az-Zawr is the windiest, the sunniest, and the hottest month of the year. In July, the weather in Dayr az-Zawr is typically hot. Average daily high temperature in July is about 40 degrees above zero. On average, Dayr az-Zawr has 31 sunny days in July. July as well as January, June, and August is considered the most uncomfortable time to visit Dayr az-Zawr.