Muri, Cook Islands: vitamin D, best months and travel guide
Rarotonga's best lagoon, with kayaks and cafés. Best for: families, couples.
The best months for vitamin D in Muri are April to December, when a full dose takes about 6 minutes at midday. Rainy or stormy from January to March.
Muri month by month
| Month | Rating | Sun window | Peak UV | Full dose, age 30 | Afternoon high | Rainy days |
|---|---|---|---|---|---|---|
| January | Bad weather | 7.8 h | 8.5 | 6 min | 26°C | 15/30 |
| February | Bad weather | 8.1 h | 8.8 | 6 min | 27°C | 14/30 |
| March | Bad weather | 7.5 h | 7.9 | 7 min | 27°C | 15/30 |
| April | Excellent | 6.9 h | 6.7 | 8 min | 27°C | 17/30 |
| May | Good | 5.8 h | 5.4 | 10 min | 26°C | 17/30 |
| June | Good | 5.3 h | 4.8 | 11 min | 24°C | 10/30 |
| July | Good | 5.6 h | 5.2 | 10 min | 24°C | 12/30 |
| August | Good | 6.4 h | 6.2 | 9 min | 23°C | 6/30 |
| September | Excellent | 7.0 h | 7.2 | 7 min | 23°C | 11/30 |
| October | Excellent | 8.0 h | 8.2 | 7 min | 23°C | 10/30 |
| November | Excellent | 8.5 h | 8.8 | 6 min | 24°C | 6/30 |
| December | Excellent | 8.3 h | 8.5 | 6 min | 25°C | 15/30 |
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 Muri
Rarotonga's best lagoon, with kayaks and cafés. A dry season from May to October, warm and humid summers, and a small, walkable scale. Rarotonga can be circled by bus in under an hour.
In Muri afternoon highs average from 23°C in September to 27°C in March. The wettest month is April (about 17 rainy days out of 30) and the driest is November (6). Midday UV peaks at 8.8 in February, which is very strong, so protect your skin.
More about Cook Islands · Cook Islands in November · Best places in November
Questions about Muri
When is the best time to visit Muri for vitamin D?
The best months for vitamin D in Muri are April to December, when a full dose takes about 6 minutes at midday.
What is the weather like in Muri?
Afternoon highs average from 23°C in September to 27°C in March. The wettest month is April, with about 17 rainy days out of 30.
Which months should I avoid in Muri?
For a beach stay, avoid the months when it is rainy or stormy from January to March.