Vitamin D from sunlight in Saudi Arabia
How long you need in the sun to make vitamin D, and when the sun is too low to make any at all, for 9 cities in Saudi Arabia.
| City | Latitude | Elevation | Vitamin D winter |
|---|---|---|---|
| Jeddah | 21.49°N | 7 m | none |
| Riyadh | 24.69°N | 612 m | none |
| Makkah | 21.43°N | 333 m | none |
| Madinah | 24.47°N | 603 m | none |
| Dammam | 26.43°N | 10 m | none |
| Buraydah | 26.33°N | 606 m | none |
| Ta’if | 21.27°N | 1,672 m | none |
| Tabuk | 28.40°N | 768 m | none |
| Ha'il | 27.52°N | 1,002 m | none |
The same sun that makes vitamin D also burns. UV index and sunburn times in Saudi Arabia →