Vitamin D from sunlight in Spain
How long you need in the sun to make vitamin D, and when the sun is too low to make any at all, for 6 cities in Spain.
| City | Latitude | Elevation | Vitamin D winter |
|---|---|---|---|
| Madrid | 40.42°N | 665 m | 5 Nov – 12 Feb (100 days) |
| Barcelona | 41.39°N | 15 m | 28 Oct – 21 Feb (117 days) |
| Valencia | 39.47°N | 15 m | 6 Nov – 11 Feb (98 days) |
| Zaragoza | 41.66°N | 214 m | 30 Oct – 19 Feb (113 days) |
| Sevilla | 37.38°N | 16 m | 16 Nov – 31 Jan (77 days) |
| Málaga | 36.72°N | 22 m | 19 Nov – 28 Jan (71 days) |
The same sun that makes vitamin D also burns. UV index and sunburn times in Spain →