Last updated: July 2, 2025
In Ko Kut, Thailand, being aware of the UV Index is crucial for maintaining skin health and preventing sunburn. Understanding the UV levels can help you take proactive measures during peak sun exposure times, especially since the island experiences a tropical climate with high UV radiation levels. With UV Index values reaching as high as 14 during midday, it’s essential to stay informed about these risks and protect yourself while enjoying the beautiful beaches and sunny weather. Whether you're lounging on the sand or exploring the lush landscapes, knowing the UV Index can significantly reduce your chances of skin damage and ensure a safer, more enjoyable experience under the Thai sun.
At sunrise, the UV Index starts gently at 1 around 07:00, providing a safe environment for early risers. However, as the day unfolds, a noticeable surge occurs, peaking at an intense 14 by 12:00. This midday zenith shimmers against the sky, urging sun-seekers to embrace protective measures. The intensity gradually dips post-lunchtime, with readings of 11 at 14:00 and plummeting to 1 by 17:00. As dusk approaches, the UV Index settles down, winding down to 0 by 19:00, signaling the end of a sun-drenched day. Be mindful of the sun’s rays as they shift throughout the day, ensuring you stay protected when the UV Index is at its peak!
| 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 | 10 | very high | 15 min |
| 11:00 | 12 | extreme | 10 min |
| 12:00 | 14 | 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 | 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 Kut | 11 | 13 | 15 | 15 | 14 | 13 | 14 | 14 | 14 | 13 | 11 | 10 |