Vitamin D in Fiji in December: sun, UV and what to expect
Bad weather Bad weather: it rains on about 21 days in December (rainy or monsoon season), so sun is hard to count on and a beach stay is not recommended.
8.0 hsun window (UV 2.5+)
8.4peak UV Index
6 minto a full dose
31°Cafternoon high
21/30rainy days
26/30sunny days
The country rating is for a typical beach, but some places in Fiji still work in December: Mamanuca Islands (excellent).
How long in the sun in December?
- If you travel anyway, plan your sun session around midday (roughly 11:00 to 15:00), when the UV Index peaks at about 8.4. With about a quarter of your skin bare, a full dose takes around 6 minutes for skin type III at age 30, and about 12 minutes at age 65.
- Stop well before your skin turns pink. At this UV level skin type III can start to burn after about 24 minutes of midday sun, so cover up, find shade and use SPF 30+ on skin that stays out.
- On clear days the UV Index reaches about 9.6, which is very strong. Keep sessions short and protect the rest of the day.
- Water, sand and light surfaces reflect UV, so at the beach you get a little more sun than the number suggests, for the good and the bad.
| Skin type | Full dose, age 30 | Full dose, age 65 | Time to burn |
|---|---|---|---|
| Type I | 4 min | 8 min | 16 min |
| Type II | 5 min | 10 min | 20 min |
| Type III | 6 min | 12 min | 24 min |
| Type IV | 10 min | 18 min | 36 min |
| Type V | 13 min | 24 min | 48 min |
| Type VI | 21 min | 40 min | 79 min |
Minutes at midday for about 1,000 IU of vitamin D with a quarter of the body bare, at Denarau Island, the median coastal place. Time to burn is the time to reach one minimal erythemal dose and does not depend on age. A rough planning guide, not medical advice.
Places in Fiji in December
| Place | Rating | Sun window | Full dose | Afternoon high | Rainy days |
|---|---|---|---|---|---|
| Mamanuca Islands | Excellent | 7.6 h | 7 min | 28°C | 16/30 |
| Yasawa Islands | Bad weather | 7.8 h | 6 min | 28°C | 19/30 |
| Nadi | Bad weather | 8.0 h | 6 min | 31°C | 21/30 |
| Denarau Island | Bad weather | 8.0 h | 6 min | 31°C | 21/30 |
| Coral Coast | Bad weather | 7.5 h | 7 min | 29°C | 22/30 |
| Taveuni | Bad weather | 7.5 h | 7 min | 28°C | 23/30 |
| Suva | Bad weather | 7.2 h | 7 min | 29°C | 25/30 |
Other months in Fiji
- Jan Bad weather
- Feb Bad weather
- Mar Bad weather
- Apr Excellent
- May Good
- Jun Good
- Jul Good
- Aug Excellent
- Sep Excellent
- Oct Excellent
- Nov Bad weather
- Dec Bad weather
Best months: April to October. Full Fiji guide