Last updated: July 2, 2025
In Santo Antonio, São Tomé and Príncipe, being aware of the UV Index is essential for protecting your skin and overall health. Understanding UV levels can help you prevent sunburn and reduce the risk of long-term skin damage. With a tropical Af climate that showcases intense sunlight, especially between 11:00 AM and 1:00 PM when the UV Index peaks at 10, residents and visitors alike should take proactive measures to stay safe. Stay informed about the UV Index to enjoy the beauty of Santo Antonio while safeguarding your skin.
The UV Index shows a dynamic pattern throughout the day, peaking sharply around midday. Starting from a gentle 1 at 07:00, the UV exposure begins to rise, hitting 3 by 08:00. The real intensity kicks in at 09:00, where it reaches 6, and then surges to a striking 8 by 10:00. The index escalates further, reaching its pinnacle at 10 from 11:00 to 12:00. As the afternoon progresses, there's a gradual decline, dropping to 9 at 13:00 and tapering off to 6 by 14:00. By 15:00, the UV Index falls to 3, and it continues its descent, dropping back down to 1 by 16:00 and beyond. As the day winds down, the levels decrease significantly, reaching 0 after 18:00, indicating a safe period for outdoor activities without considerable sun exposure. 🌞
| 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 | 8 | very high | 15 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 6 | high | 25 min |
| 15:00 | 3 | moderate | 30 min |
| 16:00 | 1 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV Index experiences notable fluctuations throughout the year, with extreme levels persisting from January to June and again in August to November, indicating a high risk of harm from unprotected sun exposure. The highest readings occur in March and April, reaching a peak of 14, while July marks a slight decline to 10, categorized as very high. For visitors and residents, the months of January through June and August through November represent high-risk months for sunburn, with a critical burn time of just 10 minutes for most of the year, except in July, when it is slightly extended to 15 minutes. It is essential for individuals to take precautions, such as wearing sunscreen, protective clothing, and seeking shade, during these months to protect against harmful UV radiation.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Santo Antonio | 12 | 12 | 14 | 14 | 13 | 11 | 10 | 11 | 13 | 13 | 12 | 11 |
| Sao Joao dos Angolares UVI | 12 | 13 | 13 | 14 | 13 | 10 | 10 | 11 | 13 | 13 | 13 | 12 |
| Trindade UVI | 12 | 13 | 13 | 14 | 13 | 10 | 10 | 11 | 13 | 13 | 13 | 12 |
| Guadalupe UVI | 12 | 13 | 13 | 14 | 13 | 10 | 10 | 11 | 13 | 13 | 13 | 12 |
| Sao Tome UVI | 12 | 13 | 13 | 14 | 13 | 10 | 10 | 11 | 13 | 13 | 13 | 12 |