howmuchsun

Vitamin D from sunlight in Tunisia

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 Tunisia.

CityLatitudeElevationVitamin D winter
Tunis 36.82°N 23 m 15 Nov – 2 Feb (80 days)
Sfax 34.74°N 8 m 25 Nov – 21 Jan (58 days)
Sousse 35.83°N 24 m 20 Nov – 28 Jan (70 days)

How these dates are calculated