Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Cayey, Puerto Rico, where the sun shines brightly nearly all year long. Keeping an eye on UV levels helps in preventing sunburn and protecting long-term skin health, especially during the peak hours when the index can reach a dazzling 13 around noon. With a climate characterized by warm temperatures and ample sunshine, it’s essential to be aware of the risks associated with high UV exposure, making smart choices about sun protection while enjoying the beautiful outdoors. Stay informed and protect your skin while soaking up the vibrant beauty of Cayey!
As the sun rises, the UV Index starts modestly at 1 at 07:00, indicating minimal risk. By 09:00, it climbs to a moderate 5, encouraging outdoor enthusiasts to take precautions. The peak emerges around 12:00, hitting a noticeably high 13, and remains intense until 14:00 when it slightly dips to 11. As the afternoon wanes, the index gradually decreases; by 15:00, it falls to 7, and as evening approaches, it continues its decline to 2 at 17:00. Finally, the UV Index settles at 1 by 18:00, ultimately dipping to a safe 0 by 19:00. It's a day where midday sun protection is paramount!
Time | UVI | Category | Time to Burn |
---|---|---|---|
07:00 | 1 | low | 45 min |
08:00 | 2 | low | 45 min |
09:00 | 5 | moderate | 30 min |
10:00 | 8 | very high | 15 min |
11:00 | 11 | extreme | 10 min |
12:00 | 13 | 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 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 |
Cayey | 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 |