Bangkok, Thailand: vitamin D, best months and travel guide
Huge, hot, energetic capital of temples, street food and malls. Best for: city lovers, foodies.
The best months for vitamin D in Bangkok are November to March, when a full dose takes about 6 minutes at midday. Too hot from April to May and rainy or stormy from June to October.
Bangkok month by month
| Month | Rating | Sun window | Peak UV | Full dose, age 30 | Afternoon high | Rainy days |
|---|---|---|---|---|---|---|
| January | Excellent | 7.3 h | 7.3 | 7 min | 33°C | 2/30 |
| February | Excellent | 8.0 h | 8.1 | 7 min | 33°C | 6/30 |
| March | Excellent | 8.4 h | 8.9 | 6 min | 33°C | 12/30 |
| April | Too hot | 8.8 h | 9.2 | 6 min | 36°C | 1/30 |
| May | Too hot | 7.7 h | 8.1 | 7 min | 34°C | 20/30 |
| June | Bad weather | 6.2 h | 7.0 | 8 min | 33°C | 27/30 |
| July | Bad weather | 5.2 h | 6.1 | 9 min | 31°C | 30/30 |
| August | Bad weather | 7.7 h | 8.0 | 7 min | 32°C | 23/30 |
| September | Bad weather | 6.4 h | 7.4 | 7 min | 32°C | 29/30 |
| October | Bad weather | 7.3 h | 7.7 | 7 min | 32°C | 21/30 |
| November | Excellent | 7.1 h | 7.2 | 7 min | 33°C | 6/30 |
| December | Excellent | 6.9 h | 6.7 | 8 min | 33°C | 2/30 |
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 Bangkok
Huge, hot, energetic capital of temples, street food and malls. A hot dry season from November to February on both coasts, and monsoon rain from May to October on the Andaman side (Phuket, Krabi). The Gulf side (Samui) is driest in the first months of the year. March to May is very hot.
In Bangkok afternoon highs average from 31°C in July to 36°C in April. The wettest month is July (about 30 rainy days out of 30) and the driest is April (1). Midday UV peaks at 9.2 in April, which is very strong, so protect your skin.
Thailand's bustling, frenetic capital, known among the Thai as Krung Thep (Wikivoyage, CC BY-SA 4.0)
More about Thailand · Thailand in March · Best places in March
Questions about Bangkok
When is the best time to visit Bangkok for vitamin D?
The best months for vitamin D in Bangkok are November to March, when a full dose takes about 6 minutes at midday.
What is the weather like in Bangkok?
Afternoon highs average from 31°C in July to 36°C in April. The wettest month is July, with about 30 rainy days out of 30.
Which months should I avoid in Bangkok?
For a beach stay, avoid the months when it is too hot from April to May and rainy or stormy from June to October.