Last updated: June 2, 2025
In Long, Thailand, being aware of the UV Index is crucial for protecting your skin and overall health. Understanding UV levels is important not just for preventing painful sunburns but also for reducing the risk of long-term skin damage and conditions like skin cancer. With Long's tropical climate often exposing residents to high UV radiation—especially during the peak hours from 11 AM to 1 PM, when values can soar to a staggering 13—it’s essential to stay informed and take necessary precautions to enjoy the sun safely. Regularly checking the UV Index can empower you to take proactive steps, ensuring you and your loved ones can bask in the beauty of this stunning region without compromising health.
The UV Index throughout the day exhibits a remarkable fluctuation, reaching its peak at 12:00 PM with a scorching 13. As the sun climbs higher, the intensity of UV radiation increases, starting from a mild 1 at 7:00 AM and surging to a notable 9 by 10:00 AM. The morning hours reveal a steady rise, culminating in a blistering 12 at 11:00 AM. After the midday peak, the UVI begins to taper off, dropping to 11 at 1:00 PM, before gradually declining to 4 by 4:00 PM. As evening approaches, the UV levels continue to diminish, landing at a safe 0 by 7:00 PM. This hourly data underlines the importance of sun safety during the peak hours, particularly between 11:00 AM and 2:00 PM, when the UV Index poses the greatest risk.
| 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 | 11 | extreme | 10 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 |
As the seasons change, UV levels fluctuate significantly, with high-risk months predominantly occurring from February to October. During this period, the UV Index often reaches extreme levels, peaking at 14 in May, July, August, and September, with a minimal burn time of just 10 minutes. In contrast, the months of January, November, and December show lower levels, hovering around a UV Index of 8 to 9, presenting a very high exposure risk with a longer burn time of 15 minutes. Visitors and residents should remain vigilant in sun protection, particularly during the peak summer months. Remember to wear sunscreen, protective clothing, and seek shade during the hottest parts of the day, especially when the UV Index is above 11.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Long | 9 | 11 | 12 | 13 | 14 | 13 | 14 | 14 | 14 | 12 | 9 | 8 |
| 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 |