Vitamin D from sunlight in Czechia
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 Czechia.
| City | Latitude | Elevation | Vitamin D winter |
|---|---|---|---|
| Prague | 50.09°N | 202 m | 29 Sep – 24 Mar (177 days) |
| Brno | 49.20°N | 226 m | 2 Oct – 21 Mar (171 days) |
| Ostrava | 49.83°N | 211 m | 30 Sep – 23 Mar (175 days) |
| Liberec | 50.77°N | 359 m | 27 Sep – 26 Mar (181 days) |
The same sun that makes vitamin D also burns. UV index and sunburn times in Czechia →