In December, the weather in San Sebastian de La Gomera is typically warm. Average daily high temperature in December is about 21 degrees above zero. On average, San Sebastian de La Gomera has 23 sunny, 7 partly cloudy, and 1 rainy day in December. The rains are usually light. December as well as April, May, June, and July is considered the most comfortable time to visit San Sebastian de La Gomera.