July in Vila Nova de Gaia is the sunniest month of the year. In July, the weather in Vila Nova de Gaia is typically warm. Average daily high temperature in July is about 22 degrees above zero. On average, Vila Nova de Gaia has 20 sunny, 7 partly cloudy, and 4 rainy days in July. The rains are usually light. July as well as August is considered the most comfortable time to visit Vila Nova de Gaia.