howmuchsun

Vitamin D from sunlight in Ecuador

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 Ecuador.

CityLatitudeElevationVitamin D winter
Quito 0.23°S 2,854 m none
Guayaquil 2.20°S 14 m none
Cuenca 2.90°S 2,484 m none

How these dates are calculated