Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Photharam, Thailand, where the sun's intensity can reach dangerously high levels. With an Aw climate, characterized by tropical weather, the UV exposure peaks around midday, making it essential to know the UV levels to prevent sunburn and protect your skin health. For instance, during the peak hours—especially from 11:00 AM to 1:00 PM—the index can soar as high as 14, indicating an extreme risk of harm from unprotected sun exposure. Being aware of these fluctuations not only helps in safeguarding your skin but also enhances your enjoyment of outdoor activities in this sunny locale.
The UV Index chart reveals a dynamic day of sun exposure, starting from a low of 1 at 07:00, where early risers enjoy gentle rays. As the day progresses, the intensity increases sharply, peaking at a striking 14 between 12:00 and 13:00, marking the time for the highest risk of harm from unprotected sun exposure. By 11:00, the index hits 12, indicating serious sunburn risk for those outdoors. The afternoon sees a gradual decline, with values dropping to 8 by 15:00 and continuing down to 0 by 19:00, signaling a safe retreat from the sun’s rays. For those venturing out, sunscreen is highly recommended during peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 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 |
The UV Index exhibits significant seasonal fluctuations, peaking during the summer months. From January to March, the UV levels start at 11 and rise to 14 by the end of April, indicating extreme exposure risk with a burn time of just 10 minutes. This high-risk period continues through the warmer months of May to August, maintaining a UV Index of 14, before slightly decreasing in September and October to 13. The risk remains considerable into November with a drop to 10 and a burn time of 15 minutes, and December follows with a UV Index of 9. Visitors and residents are advised to exercise caution, particularly from March to August, ensuring proper sun protection measures such as wearing sunscreen, protective clothing, and seeking shade to minimize the risk of skin damage.
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 |
| Photharam | 11 | 12 | 14 | 14 | 14 | 13 | 14 | 14 | 13 | 13 | 10 | 9 |