Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors in Wiang Sa, Thailand, where the hot, tropical climate brings significant sun exposure year-round. With UV levels often peaking around noon, reaching a maximum of 14, being aware of these levels is essential to prevent sunburn and maintain healthy skin. As the sun's intensity can vary throughout the day, knowing when to seek shade or apply sunscreen becomes vital for enjoying outdoor activities safely. In Wiang Sa, where the climate is characterized as Aw, the UV exposure risks demand vigilance to protect yourself and your loved ones from harmful effects.
The UV Index today offers a clear picture of solar intensity as the day unfolds. Starting with a calm 1 at 7:00 AM, the sun's rays begin to strengthen, reaching 3 by 8:00 AM. The peak intensity hits at 12:00 PM, soaring to an impressive 14, indicating a strong need for sun protection. As the afternoon progresses, it gradually decreases, dropping to 4 by 4:00 PM and winding down to 1 by 6:00 PM. By 7:00 PM, the UV Index retreats to 0, showcasing the significant daily variation in UV exposure. It's essential to stay alert during those peak hours, especially between 10:00 AM and 1:00 PM, when UV radiation 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 | 10 | very high | 15 min |
| 11:00 | 13 | 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 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV Index in this region exhibits significant variation throughout the year, peaking during the summer months. From January to April, the UV Index ranges from 9 to 13, indicating a shift from very high to extreme exposure levels, with a burn time decreasing from 15 minutes to just 10 minutes. The months of May through September experience the highest UV indices, reaching a maximum of 15 in July with an extreme exposure category, where even brief sun exposure can lead to burns in as little as 10 minutes. As October arrives, the index decreases slightly, but remains in the extreme range at 13, before transitioning back to very high levels in November and December, where burn times extend to 15 minutes. Given these patterns, it is crucial for visitors and residents to take precautionary measures during the high-risk months of February to October, such as wearing sunscreen, protective clothing, and limiting sun exposure during peak hours to safeguard against UV-related health risks.
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 |
| Wiang Sa | 9 | 11 | 13 | 13 | 14 | 14 | 15 | 14 | 14 | 13 | 10 | 8 |
| Chon Buri UVI | 10 | 13 | 14 | 14 | 14 | 13 | 14 | 14 | 13 | 13 | 10 | 9 |