September in San Sebastian de La Gomera is the warmest month of the year. In September, the weather in San Sebastian de La Gomera is typically warm. Average daily high temperature in September is about 23 degrees above zero. On average, San Sebastian de La Gomera has 25 sunny, 3 partly cloudy, 1 rainy, and 1 cloudy day in September. The rains are usually light. September as well as June, July, August, and October is considered the most comfortable time to visit San Sebastian de La Gomera.