Vitamin D from sunlight in Ireland
How long you need in the sun to make vitamin D, and when the sun is too low to make any at all, for 13 cities in Ireland.
| City | Latitude | Elevation | Vitamin D winter |
|---|---|---|---|
| Dublin | 53.33°N | 17 m | 23 Sep – 31 Mar (190 days) |
| Cork | 51.90°N | 10 m | 27 Sep – 26 Mar (181 days) |
| Limerick | 52.66°N | 7 m | 25 Sep – 28 Mar (185 days) |
| Galway | 53.27°N | 10 m | 23 Sep – 30 Mar (189 days) |
| Waterford | 52.26°N | 10 m | 26 Sep – 27 Mar (183 days) |
| Drogheda | 53.72°N | 28 m | 21 Sep – 1 Apr (193 days) |
| Dundalk | 54.00°N | 18 m | 20 Sep – 2 Apr (195 days) |
| Swords | 53.46°N | 17 m | 22 Sep – 1 Apr (192 days) |
| Navan | 53.65°N | 35 m | 22 Sep – 1 Apr (192 days) |
| Bray | 53.20°N | 7 m | 23 Sep – 31 Mar (190 days) |
| Ennis | 52.84°N | 3 m | 24 Sep – 29 Mar (187 days) |
| Carlow | 52.84°N | 55 m | 24 Sep – 29 Mar (187 days) |
| Tralee | 52.27°N | 10 m | 26 Sep – 27 Mar (183 days) |
The same sun that makes vitamin D also burns. UV index and sunburn times in Ireland →