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 2 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) |
The same sun that makes vitamin D also burns. UV index and sunburn times in Spain →