San Sebastián, Spain: vitamin D, best months and travel guide
Elegant bay and some of the best food in Spain, but cooler and wetter. Best for: foodies, couples.
The best months for vitamin D in San Sebastián are July, August, when a full dose takes about 8 minutes at midday. Too cool from September to June.
San Sebastián month by month
| Month | Rating | Sun window | Peak UV | Full dose, age 30 | Afternoon high | Rainy days |
|---|---|---|---|---|---|---|
| January | Too cold | 0.4 h | 2.0 | – | 15°C | 7/30 |
| February | Too cold | 1.7 h | 2.6 | 21 min | 15°C | 16/30 |
| March | Too cold | 4.8 h | 4.3 | 12 min | 17°C | 15/30 |
| April | Too cold | 6.2 h | 5.6 | 10 min | 18°C | 13/30 |
| May | Too cold | 6.9 h | 6.0 | 9 min | 18°C | 15/30 |
| June | Too cold | 7.2 h | 6.1 | 9 min | 21°C | 12/30 |
| July | Excellent | 8.2 h | 6.7 | 8 min | 24°C | 8/30 |
| August | Good | 7.2 h | 6.1 | 9 min | 24°C | 7/30 |
| September | Too cold | 5.3 h | 4.8 | 11 min | 22°C | 12/30 |
| October | Too cold | 3.3 h | 3.3 | 16 min | 22°C | 14/30 |
| November | Too cold | 1.0 h | 2.3 | – | 19°C | 7/30 |
| December | Too cold | 0.0 h | 1.6 | – | 14°C | 15/30 |
Sun window is the number of hours a day with UV Index 2.5 or higher. Full dose is the minutes at midday for about 1,000 IU of vitamin D with a quarter of the body bare, for skin type III. Rainy days are days with at least 1 mm out of 30.
What to expect in San Sebastián
Elegant bay and some of the best food in Spain, but cooler and wetter. Long sandy beaches, lively resorts, late dinners and a siesta culture. July and August are hot and crowded; spring and autumn are calmer and good value. The Atlantic coast and the north are cooler and wetter.
In San Sebastián afternoon highs average from 14°C in December to 24°C in August. The wettest month is February (about 16 rainy days out of 30) and the driest is November (7). Midday UV peaks at 6.7 in July.
Questions about San Sebastián
When is the best time to visit San Sebastián for vitamin D?
The best months for vitamin D in San Sebastián are July, August, when a full dose takes about 8 minutes at midday.
What is the weather like in San Sebastián?
Afternoon highs average from 14°C in December to 24°C in August. The wettest month is February, with about 16 rainy days out of 30.
Which months should I avoid in San Sebastián?
For a beach stay, avoid the months when it is too cool from September to June.