Vitamin D in Cayman Islands in January: sun, UV and what to expect
Good Good. A full dose takes about 8 minutes at midday, and the usable window is about 6.8 hours a day.
6.8 hsun window (UV 2.5+)
6.4peak UV Index
8 minto a full dose
28°Cafternoon high
16/30rainy days
30/30sunny days
Best places in Cayman Islands in January: Cayman Brac (good), Seven Mile Beach (good), West Bay (good), George Town (good), Stingray City (good).
Open Cayman Islands for January on the map Find stays in Cayman Islands
How long in the sun in January?
- Plan your sun session around midday (roughly 11:00 to 15:00), when the UV Index peaks at about 6.4. With about a quarter of your skin bare, a full dose takes around 8 minutes for skin type III at age 30, and about 16 minutes at age 65.
- Stop well before your skin turns pink. At this UV level skin type III can start to burn after about 31 minutes of midday sun, so cover up, find shade and use SPF 30+ on skin that stays out.
- 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 | 6 min | 10 min | 21 min |
| Type II | 7 min | 13 min | 26 min |
| Type III | 8 min | 16 min | 31 min |
| Type IV | 12 min | 23 min | 47 min |
| Type V | 17 min | 31 min | 62 min |
| Type VI | 28 min | 52 min | 1.7 h |
Minutes at midday for about 1,000 IU of vitamin D with a quarter of the body bare, at West Bay, 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 Cayman Islands in January
| Place | Rating | Sun window | Full dose | Afternoon high | Rainy days |
|---|---|---|---|---|---|
| Cayman Brac | Good | 6.7 h | 8 min | 27°C | 10/30 |
| Seven Mile Beach | Good | 6.8 h | 8 min | 28°C | 16/30 |
| West Bay | Good | 6.8 h | 8 min | 28°C | 16/30 |
| George Town | Good | 6.8 h | 8 min | 28°C | 16/30 |
| Stingray City | Good | 6.8 h | 8 min | 28°C | 16/30 |
Other months in Cayman Islands
- Jan Good
- Feb Excellent
- Mar Bad weather
- Apr Excellent
- May Excellent
- Jun Bad weather
- Jul Bad weather
- Aug Excellent
- Sep Bad weather
- Oct Bad weather
- Nov Bad weather
- Dec Good
Best months: April, May, August, December to February. Full Cayman Islands guide