Vitamin D from sunlight in Switzerland
How long you need in the sun to make vitamin D, and when the sun is too low to make any at all, for 3 cities in Switzerland.
| City | Latitude | Elevation | Vitamin D winter |
|---|---|---|---|
| Zürich | 47.37°N | 429 m | 8 Oct – 14 Mar (158 days) |
| Geneva | 46.20°N | 400 m | 12 Oct – 10 Mar (150 days) |
| Basel | 47.56°N | 279 m | 7 Oct – 15 Mar (160 days) |
The same sun that makes vitamin D also burns. UV index and sunburn times in Switzerland →