July in Tarragona is the sunniest and the hottest month of the year. In July, the weather in Tarragona is typically hot. Average daily high temperature in July is about 30 degrees above zero. On average, Tarragona has 20 sunny, 6 partly cloudy, and 5 rainy days in July. The rains are usually light. July as well as May, June, and October is considered the most comfortable time to visit Tarragona.