Vitamin D from sunlight in New Zealand
How long you need in the sun to make vitamin D, and when the sun is too low to make any at all, for 20 cities in New Zealand.
| City | Latitude | Elevation | Vitamin D winter |
|---|---|---|---|
| Auckland | 36.85°S | 43 m | 23 May – 28 Jul (67 days) |
| Christchurch | 43.53°S | 14 m | 25 Apr – 26 Aug (124 days) |
| Wellington | 41.29°S | 31 m | 3 May – 17 Aug (107 days) |
| Manukau City | 36.99°S | 43 m | 22 May – 28 Jul (68 days) |
| Hamilton | 37.78°S | 39 m | 18 May – 2 Aug (77 days) |
| Tauranga | 37.69°S | 18 m | 18 May – 1 Aug (76 days) |
| Dunedin | 45.87°S | 21 m | 17 Apr – 4 Sep (141 days) |
| Lower Hutt | 41.22°S | 9 m | 3 May – 17 Aug (107 days) |
| Palmerston North | 40.36°S | 34 m | 7 May – 13 Aug (99 days) |
| New Plymouth | 39.07°S | 64 m | 12 May – 8 Aug (89 days) |
| Hastings | 39.64°S | 19 m | 10 May – 10 Aug (93 days) |
| Napier | 39.49°S | 6 m | 10 May – 10 Aug (93 days) |
| Rotorua | 38.14°S | 287 m | 17 May – 2 Aug (78 days) |
| Porirua | 41.13°S | 58 m | 4 May – 17 Aug (106 days) |
| Invercargill | 46.40°S | 6 m | 15 Apr – 6 Sep (145 days) |
| Papatoetoe | 36.97°S | 19 m | 22 May – 28 Jul (68 days) |
| Nelson | 41.27°S | 11 m | 3 May – 18 Aug (108 days) |
| Whangarei | 35.73°S | 7 m | 29 May – 21 Jul (54 days) |
| Whanganui | 39.93°S | 18 m | 8 May – 12 Aug (97 days) |
| Upper Hutt | 41.14°S | 60 m | 4 May – 17 Aug (106 days) |
The same sun that makes vitamin D also burns. UV index and sunburn times in New Zealand →