howmuchsun

Vitamin D from sunlight in Slovakia

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 Slovakia.

CityLatitudeElevationVitamin D winter
Bratislava 48.15°N 157 m 5 Oct – 17 Mar (164 days)
Košice 48.71°N 205 m 4 Oct – 19 Mar (167 days)
Petržalka 48.12°N 141 m 5 Oct – 17 Mar (164 days)

How these dates are calculated