howmuchsun

Vitamin D from sunlight in Italy

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 Italy.

CityLatitudeElevationVitamin D winter
Rome 41.89°N 20 m 26 Oct – 23 Feb (121 days)
Milan 45.46°N 122 m 14 Oct – 8 Mar (146 days)

How these dates are calculated