July in Rovinj is the warmest month of the year. In July, the weather in Rovinj is typically warm. Average daily high temperature in July is about 26 degrees above zero. On average, Rovinj has 27 sunny, 3 partly cloudy, and 1 rainy day in July. The rains are usually light. July as well as August is considered the most comfortable time to visit Rovinj.