Last updated: June 2, 2025
Understanding the UV Index is crucial for the residents of Juana Diaz, Puerto Rico, where sunny days are plentiful. Being aware of the UV levels can significantly enhance your skin health and help prevent painful sunburns, which can lead to more severe skin issues over time. With a tropical climate that often sees high UV exposure, especially during peak hours from 10 AM to 2 PM when the index soars, it's essential to take proactive measures to protect your skin. By keeping track of the UV Index, you can enjoy the beautiful Puerto Rican sunshine safely!
The UV Index today reflects a dynamic progression of sun intensity throughout the hours. Starting at a modest 1 at 07:00, it gradually climbs to 3 by 08:00. A steady ascent leads to a significant peak of 13 at both 12:00 and 13:00, marking the most critical hours for sun exposure. As the afternoon wanes, the index gently descends to 10 at 14:00, then to 7 at 15:00, before tapering off to 4 at 16:00. By 18:00, it drops back to 1, and the day concludes under the protective shroud of dusk with a 0 by 19:00. This data serves as a reminder to stay sun-safe during peak hours, particularly between 10:00 and 14:00 when the sun's rays are at their strongest.
| 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 | 11 | extreme | 10 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 10 | very high | 15 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 exhibits significant seasonal changes, with the highest readings occurring from February to October, where exposure levels reach an extreme category and burn times are dangerously short at 10 minutes. March through September are particularly high-risk months, peaking in April and May with a UV Index of 14. Residents and visitors should be extremely cautious during these months, ensuring proper sun protection such as wearing sunscreen, protective clothing, and sunglasses. In contrast, November and December are notable for their relatively lower UV levels classified as very high, albeit still requiring sun safety measures, with burn times lengthening to 15 minutes. It is advisable for everyone to monitor the UV Index regularly and adopt appropriate precautions year-round to minimize the risk of sunburn and long-term skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Caguas UVI | 9 | 11 | 13 | 13 | 14 | 13 | 12 | 13 | 13 | 12 | 9 | 8 |
| Carolina UVI | 9 | 11 | 13 | 13 | 14 | 13 | 12 | 13 | 13 | 12 | 9 | 8 |
| San Juan UVI | 9 | 11 | 13 | 13 | 14 | 13 | 12 | 13 | 13 | 12 | 9 | 8 |
| Bayamon UVI | 9 | 11 | 13 | 13 | 14 | 13 | 13 | 13 | 13 | 12 | 9 | 8 |
| Juana Diaz | 9 | 11 | 13 | 14 | 14 | 13 | 13 | 13 | 14 | 12 | 10 | 9 |
| Ponce UVI | 9 | 11 | 13 | 14 | 14 | 13 | 13 | 13 | 14 | 12 | 10 | 9 |