Last updated: July 2, 2025
In Uthai Thani, Thailand, awareness of the UV Index is crucial for safeguarding your skin against the harmful effects of ultraviolet radiation. Understanding UV levels can help you prevent sunburn and protect your long-term skin health, especially in a region characterized by its hot, tropical Aw climate. With UV levels peaking around noon, where they can reach a staggering 14 on the index, it’s vital for residents and visitors to stay informed and take appropriate precautions during peak hours. By checking the UV Index regularly, you can enjoy the sunny outdoors while minimizing the risk of skin damage.
The UV Index begins its ascent at 7:00 AM, starting modestly at 1, but by 9:00 AM, it escalates to a more noticeable 6. The real surge occurs around 11:00 AM, peaking at an intense 12 and reaching its highest point of 14 by noon and 1:00 PM. As the afternoon progresses, the intensity starts to wane, dipping to 11 at 2:00 PM, and then gradually decreasing to 8 by 3:00 PM. As the sun sets, the UV levels drop swiftly, dropping to 4 at 4:00 PM, and ultimately retreating to a mere 1 by 6:00 PM and 0 by 7:00 PM. Throughout the day, it's clear to stay protected during those peak hours when the UV exposure could be most harmful.
| 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 | 14 | extreme | 10 min |
| 13:00 | 14 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 8 | very high | 15 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 |
Throughout the year, the UV Index demonstrates significant seasonal variations, with peak levels occurring from February to October, where values reach as high as 14 in several months, classified as extreme. The high-risk months for UV exposure are February through October, with March, April, July, August, and September consistently recording the highest intensity. During these months, the recommended burn time is just 10 minutes, emphasizing the need for protective measures. Residents and visitors are advised to take precautions, such as applying broad-spectrum sunscreen, wearing protective clothing, and seeking shade, especially during midday hours, to mitigate the risk of skin damage and other UV-related health issues. In contrast, November and December present lower UV levels (9-10), where burn times lengthen to 15 minutes, but caution is still warranted during outdoor activities.
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 |
| Uthai Thani | 10 | 12 | 13 | 14 | 14 | 13 | 14 | 14 | 14 | 13 | 10 | 9 |
| Chon Buri UVI | 10 | 13 | 14 | 14 | 14 | 13 | 14 | 14 | 13 | 13 | 10 | 9 |