Last updated: July 2, 2025
In Wan Yai, Thailand, being aware of the UV Index is crucial for protecting your skin from harmful sun exposure. Understanding UV levels helps you take preventive measures against sunburn and long-term skin health issues. With a tropical climate characterized by high UV radiation—often peaking at a staggering 15 around noon—residents and visitors alike should remain vigilant about their sun safety. By keeping an eye on the UV Index, you can enjoy the beautiful weather while ensuring your skin stays healthy and protected.
As the sun rises, the UV Index begins its ascent, starting modestly at a maximum of 1 at 7:00 AM. By 8:00 AM, it climbs to a notable 4, signaling the need for sun protection. The day reaches its peak at 12:00 PM, where it soars to a striking 15, highlighting the intensity of midday sun. From there, it gradually dips; by 3:00 PM, it retreats to 7, before continuing down to 1 by 5:00 PM and 6:00 PM and finally dropping to 0 at 7:00 PM. This hourly fluctuation emphasizes the importance of vigilance in sun safety, especially during the midday hours when UV rays are at their most potent.
Time | UVI | Category | Time to Burn |
---|---|---|---|
07:00 | 1 | low | 45 min |
08:00 | 4 | moderate | 30 min |
09:00 | 7 | high | 25 min |
10:00 | 11 | extreme | 10 min |
11:00 | 14 | extreme | 10 min |
12:00 | 15 | 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 |
Throughout the year, the UV Index shows significant fluctuations, indicating varying levels of sun exposure risk. From January to April, UV levels rise sharply, peaking in April at an index of 15, defining it as a month with extreme exposure risk; similar levels prevail in July. The months of February, March, April, June, July, August, September, and October all demonstrate extreme ratings, suggesting that ten minutes of unprotected exposure can lead to sunburn. Notably, February, March, April, and July are the highest-risk months with indices at 12 or above. Conversely, November and December experience a drop to very high ratings at 10 and 9, respectively, where 15 minutes of exposure could result in burns. To protect yourself, it is essential for both visitors and residents to take necessary precautions during high UV months, such as seeking shade, wearing protective clothing, and applying sunscreen regularly.
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 |
Wan Yai | 9 | 12 | 14 | 15 | 14 | 13 | 15 | 14 | 14 | 12 | 10 | 9 |
Chon Buri UVI | 10 | 13 | 14 | 14 | 14 | 13 | 14 | 14 | 13 | 13 | 10 | 9 |