Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors of Chaloem Phra Kiat, Thailand, where the sun shines brightly in an Aw climate zone. With UV levels peaking at a staggering 13 around midday, awareness of these levels is vital for sunburn prevention and maintaining long-term skin health. Protecting yourself from harmful UV radiation can significantly reduce the risk of skin damage and related health issues, especially under the intense sun typical of this region. Keep an eye on the UV Index throughout the day to stay safe and enjoy the beautiful weather!
At 07:00, the UV Index starts at a low 1, providing a gentle introduction to the day. As the sun climbs higher, the intensity begins to rise sharply, hitting 3 by 08:00 and reaching a notable 5 by 09:00. The real surge occurs between 10:00 and 12:00, where the UV Index soars from 9 to a peak of 13. The afternoon maintains this intensity, with 12 at 13:00 and gradually tapering off afterward. By 15:00, it dips to 7, then drops further to 4 by 16:00. As the sun sets, the UV Index returns to a lower level, sitting at 2 by 17:00, and finally tapering to 1 at 18:00, before completely fading to 0 by 19:00. This daily UV Index cycle highlights the importance of sun safety during peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 12 | extreme | 10 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV Index exhibits significant variability throughout the year, with particularly high levels from February to October. This period is characterized by an extreme exposure category, peaking in April with an index of 14. March through October consistently shows an index of 12-13, indicating a dangerous risk of harm from unprotected sun exposure, with a minimal burn time of just 10 minutes. The high-risk months are notably February, March, April, May, June, July, August, September, and October, where it is crucial for visitors and residents to take precautions. During these months, it’s advisable to wear protective clothing, apply broad-spectrum sunscreen, and seek shade during peak hours to minimize the risk of skin damage. In contrast, January, November, and December have a lower UV Index, falling under the very high category, allowing for slightly longer exposure times of 15 minutes without protection. However, caution is still recommended during these months as well.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chaloem Phra Kiat | 9 | 12 | 13 | 14 | 13 | 12 | 13 | 13 | 13 | 12 | 10 | 9 |
| Mueang Nonthaburi UVI | 10 | 12 | 14 | 13 | 14 | 13 | 14 | 14 | 13 | 12 | 9 | 8 |
| Samut Prakan UVI | 10 | 12 | 14 | 13 | 14 | 13 | 14 | 14 | 13 | 12 | 9 | 8 |
| Bangkok UVI | 10 | 12 | 14 | 13 | 14 | 13 | 14 | 14 | 13 | 12 | 9 | 8 |
| Udon Thani UVI | 9 | 11 | 13 | 14 | 14 | 13 | 14 | 14 | 14 | 12 | 10 | 9 |
| Chon Buri UVI | 10 | 13 | 14 | 14 | 14 | 13 | 14 | 14 | 13 | 13 | 10 | 9 |