howmuchsun

Vitamin D from sunlight in Croatia

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 Croatia.

CityLatitudeElevationVitamin D winter
Zagreb 45.81°N 135 m 13 Oct – 9 Mar (148 days)
Split 43.51°N 12 m 20 Oct – 1 Mar (133 days)
Rijeka 45.33°N 12 m 14 Oct – 8 Mar (146 days)

How these dates are calculated