howmuchsun

Vitamin D from sunlight in Peru

How long you need in the sun to make vitamin D, and when the sun is too low to make any at all, for 4 cities in Peru.

CityLatitudeElevationVitamin D winter
Lima 12.04°S 152 m none
Callao 12.05°S 5 m none
Arequipa 16.40°S 2,397 m none
Trujillo 8.12°S 31 m none

How these dates are calculated