December in Vila Nova de Gaia is the windiest month of the year. In December, the weather in Vila Nova de Gaia is typically warm. Average daily high temperature in December is about 13 degrees above zero. On average, Vila Nova de Gaia has 14 rainy, 10 sunny, 4 cloudy, and 3 partly cloudy days in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit Vila Nova de Gaia.