Caye Caulker, Belize: vitamin D, best months and travel guide
"Go slow" island of sandy lanes and snorkelling. Best for: backpackers, divers, budget travellers.
The best months for vitamin D in Caye Caulker are January to May, when a full dose takes about 6 minutes at midday. Rainy or stormy from June to December.
Caye Caulker month by month
| Month | Rating | Sun window | Peak UV | Full dose, age 30 | Afternoon high | Rainy days |
|---|---|---|---|---|---|---|
| January | Good | 6.9 h | 6.6 | 8 min | 27°C | 9/30 |
| February | Excellent | 7.3 h | 7.5 | 7 min | 27°C | 6/30 |
| March | Excellent | 8.1 h | 8.6 | 6 min | 28°C | 3/30 |
| April | Excellent | 8.8 h | 8.9 | 6 min | 28°C | 7/30 |
| May | Excellent | 9.0 h | 9.0 | 6 min | 29°C | 1/30 |
| June | Bad weather | 7.5 h | 7.1 | 8 min | 30°C | 24/30 |
| July | Bad weather | 8.4 h | 8.0 | 7 min | 30°C | 24/30 |
| August | Bad weather | 8.4 h | 8.3 | 6 min | 30°C | 23/30 |
| September | Bad weather | 8.1 h | 8.3 | 6 min | 30°C | 23/30 |
| October | Bad weather | 6.0 h | 6.7 | 8 min | 29°C | 25/30 |
| November | Bad weather | 6.7 h | 6.4 | 8 min | 28°C | 18/30 |
| December | Bad weather | 6.1 h | 5.7 | 9 min | 27°C | 21/30 |
Sun window is the number of hours a day with UV Index 2.5 or higher. Full dose is the minutes at midday for about 1,000 IU of vitamin D with a quarter of the body bare, for skin type III. Rainy days are days with at least 1 mm out of 30.
What to expect in Caye Caulker
"Go slow" island of sandy lanes and snorkelling. A dry season from December to April and a wetter, stormy season from June to November. Beaches are modest, with the draw being the reef and the cayes.
In Caye Caulker afternoon highs average from 27°C in February to 30°C in September. The wettest month is October (about 25 rainy days out of 30) and the driest is May (1). Midday UV peaks at 9.0 in May, which is very strong, so protect your skin.
Smaller barrier island in the north (Wikivoyage, CC BY-SA 4.0)
Questions about Caye Caulker
When is the best time to visit Caye Caulker for vitamin D?
The best months for vitamin D in Caye Caulker are January to May, when a full dose takes about 6 minutes at midday.
What is the weather like in Caye Caulker?
Afternoon highs average from 27°C in February to 30°C in September. The wettest month is October, with about 25 rainy days out of 30.
Which months should I avoid in Caye Caulker?
For a beach stay, avoid the months when it is rainy or stormy from June to December.