howmuchsun

Vitamin D from sunlight in Lebanon

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 Lebanon.

CityLatitudeElevationVitamin D winter
Beirut 33.89°N 40 m 5 Dec – 12 Jan (39 days)
Tripoli 34.43°N 51 m 1 Dec – 16 Jan (47 days)
Sidon 33.56°N 9 m 7 Dec – 9 Jan (34 days)

How these dates are calculated