Last updated: July 2, 2025
Understanding the UV Index in Chiang Rai, Thailand is essential for safeguarding your skin health and preventing sunburn, especially as this region experiences significant sun exposure due to its tropical climate. With UV levels peaking around noon with an intensity of 14, it's vital to keep an eye on these readings to protect against harmful UV radiation. By being aware of the UV Index, you empower yourself to enjoy the beautiful outdoors while minimizing risks such as skin damage and long-term health issues. Stay informed and stay safe as you embrace the vibrant sunshine of Chiang Rai!
The UV Index begins its rise at dawn, peaking during midday hours. At 07:00, it starts low at 1, but as the sun climbs higher, it scales up to 14 by 12:00—the most intense exposure time. From 10:00 to 13:00, the UV Index reaches its zenith, peaking at 14. After this, it begins to decline gradually, dropping to 5 by 16:00, and further to 1 by 18:00. Finally, as the day turns to dusk at 19:00, the UV Index falls to a safe 0. Stay mindful of these hours when planning outdoor activities, as the strongest rays demand protective measures!
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 | 13 | extreme | 10 min |
12:00 | 14 | extreme | 10 min |
13:00 | 14 | extreme | 10 min |
14:00 | 12 | extreme | 10 min |
15:00 | 8 | very high | 15 min |
16:00 | 5 | moderate | 30 min |
17:00 | 2 | low | 45 min |
18:00 | 1 | low | 45 min |
19:00 | 0 | low | 45 min |
Throughout the year, UV Index levels exhibit significant seasonal variation, with the highest values observed from March to October. During this period, the UV Index peaks at 14, categorized as extreme from May to September, where the recommended maximum sun exposure is only 10 minutes before burns can occur. January and February start with a very high rating of 9 and 10, respectively, allowing for a slightly longer burn time of 15 minutes. Notably, the months of March, April, and October transition back to extreme but still maintain 10 minutes of safe exposure. For residents and visitors, it is crucial to take protective measures, especially during the high-risk months from March to October. Recommendations include wearing broad-spectrum sunscreen, protective clothing, and seeking shade during peak sun hours to minimize the risk of skin damage.
UV Risk Categories
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chiang Rai | 9 | 10 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 13 | 10 | 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 |