Last updated: June 2, 2025
In Ko Chang Tai, Thailand, understanding the UV Index is crucial for maintaining skin health and preventing sunburn, especially given the region's tropical climate. With UV levels often peaking at 13 during midday hours, awareness of these fluctuations can help residents and visitors alike protect themselves from harmful sun exposure. The high UV index, particularly between 10 AM and 4 PM, emphasizes the need for precautions to ensure enjoyable days under the sun without compromising skin safety. Stay informed about UV levels in Ko Chang Tai to make the most of your outdoor adventures while safeguarding your skin!
At 07:00, the UV Index begins at a safe 1, indicating low risk of harm from unprotected sun exposure. As the sun rises higher, 08:00 sees a moderate increase to 3. However, by 09:00, the intensity escalates to 6, marking the start of increased caution. The peak UV Index occurs between 11:00 and 12:00, hitting a striking 13, prompting a strong recommendation for sun protection. Following this interval, a gradual decline begins: 13:00 and 14:00 remain elevated at 13 and 10, respectively, before descending quickly to 7 by 15:00. As the afternoon fades, the UV Index drops to 3 at 16:00 and finally winds down to 1 by 17:00, with the evening ushering in a safe 0 by 19:00. It's crucial to stay cautious during the peak hours to enjoy the sunshine safely!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 12 | extreme | 10 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV Index exhibits extreme levels from January through October, with the highest values occurring in March and April at 15. This creates a consistently high-risk environment for UV exposure, where the recommended burn time is just 10 minutes across these months. May, July, August, and September also register significant UV levels of 14, indicating that residents and visitors should maintain vigilant sun safety practices. November and December see a slight decrease in UV intensity, dropping to 11 and 10 respectively, yet remain within the very high category, allowing for a burn time of 15 minutes. For optimal safety, it is critical for individuals to take precautions—such as wearing sunscreen, protective clothing, and seeking shade—especially during the high-risk months from January to October.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| Ko Chang Tai | 11 | 13 | 15 | 15 | 14 | 13 | 14 | 14 | 14 | 13 | 11 | 10 |