Last updated: July 2, 2025
In Phana, Thailand, understanding the UV Index is crucial for protecting your skin from the sun's potentially harmful effects. With the region's tropical Aw climate, residents and visitors alike must pay attention to daily UV levels, especially during peak hours. High UV exposure can lead to sunburn, accelerate skin aging, and increase the risk of skin cancer. During the sunniest hours, such as between 10:00 AM and 2:00 PM, the UV Index can soar to dangerous levels, reaching as high as 14. Staying informed about UV levels in Phana can help you take necessary precautions to safeguard your skin health while enjoying the beautiful outdoors.
At dawn, the UV Index begins its climb, starting at a low 1 by 7:00 AM. As the day progresses, it swiftly escalates, reaching a peak of 14 by 12:00 PM, indicating a strong potential for skin damage without protection. The height of the sun brings a scorching 13 at 1:00 PM, followed by a slight dip to 10 by 2:00 PM. As afternoon fades into evening, the UV Index drops significantly, plummeting to 3 by 4:00 PM and settling back to a minimal 1 by 7:00 PM. The day's UV journey reflects the sun's relentless power, reminding us of the importance of safeguarding our skin during peak hours!
| 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 | 13 | extreme | 10 min |
| 12:00 | 14 | 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 |
The UV Index experiences significant seasonal changes, peaking at 15 during the spring and early summer months of April and May, indicating an extreme exposure category with a burn time of just 10 minutes. This trend continues into June, July, and August, where the index remains high at 13-14, keeping burn times consistent. Moving into September and October, the index remains at 12, still categorized as extreme. The high-risk months for UV exposure are particularly pronounced from February to October, making it crucial for both visitors and residents to take protective measures. During these months, it is advisable to minimize sun exposure between 10 AM and 4 PM, wear protective clothing, and apply sunscreen regularly to safeguard against harmful UV radiation. As the year concludes, November and December see a slight decline in UV levels to 10 and 9, respectively, where the exposure category shifts to very high, but caution is still recommended when spending extended time outdoors.
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 |
| Phana | 10 | 13 | 14 | 15 | 15 | 13 | 14 | 14 | 14 | 12 | 10 | 9 |