Expect the average daily weather in San Sebastian all through May is 13. Throughout the month you should see a high of 19 with lows of 11. We have put some more information below:
| Month | Degrees Celsius |
|---|---|
| Temperature | 13 |
| High Temperature | 19 |
| Low Temperature | 11 |
| Sunshine Per Day | 7 |
Useful Links: San Sebastian Weather: Average Weather & Yearly Climate