The weather in San Sebastian in December is hot. The average temperatures are between 20°C and 21°C.
You can expect a few rainy days in San Sebastian during December, but usually the weather is comfortable in December.
Our weather forecast can give you a great sense of what weather to expect in San Sebastian in December 2023.
If you’re planning to visit San Sebastian in the near future, we highly recommend that you review the 14 day weather forecast for San Sebastian before you arrive.