howmuchsun

Vitamin D from sunlight in Estonia

How long you need in the sun to make vitamin D, and when the sun is too low to make any at all, for 2 cities in Estonia.

CityLatitudeElevationVitamin D winter
Tallinn 59.44°N 12 m 29 Aug – 25 Apr (240 days)
Tartu 58.38°N 39 m 2 Sep – 21 Apr (232 days)

How these dates are calculated