Last updated: May 3, 2025
In Santo Amaro, Brazil, being aware of the UV Index is crucial for protecting your skin and health under the intense sun. Understanding UV levels is essential not only for preventing painful sunburns but also for maintaining long-term skin health against harmful UV radiation. With a tropical climate characterized by strong sunlight and typically elevated UV exposure—especially peaking at an index of 11 between 11:00 AM and 12:00 PM—locals and visitors alike must stay informed and take necessary precautions to enjoy the sun safely.
During the day, the UV Index experiences a dynamic fluctuation. Starting from a calm 1 at 07:00, it rises steadily, peaking at an intense 11 by 11:00, indicating a high risk of harm from unprotected sun exposure. As the clock hits 12:00, it slightly drops to 10, but remains within the very high range. The afternoon sees a gradual decline, dropping to 6 by 14:00, and further down to 3 by 15:00, signaling a safer environment for outdoor activities. As the sun sets, the index plummets to 1 by 16:00 and ultimately reaches 0 by 18:00, leaving a serene evening ahead. Always remember to protect your skin when the UV Index is high!
| 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 | 9 | very high | 15 min |
| 11:00 | 11 | extreme | 10 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 seasonal fluctuations, with the most intense levels occurring during the winter and early spring months, particularly from January to April, where it consistently reaches 14, categorized as extreme. These months, alongside the months of October and November (also with an index of 15), present the highest risk for sunburn, with a burn time of only 10 minutes. As summer approaches, the index dips slightly, dropping to 9 in June and 10 in July, classified as very high and allowing for a burn time of 15 minutes. Despite this slight decrease, the months of August and September again see an extreme rating of 12. Given these conditions, it is crucial for visitors and residents alike to take appropriate precautions during these high-risk months—such as using sunscreen, wearing protective clothing, and limiting outdoor activities during peak sunlight hours—to ensure safety against harmful UV exposure.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rio de Janeiro UVI | 15 | 14 | 13 | 10 | 7 | 6 | 7 | 9 | 11 | 12 | 13 | 15 |
| Sao Paulo UVI | 16 | 15 | 12 | 11 | 8 | 6 | 7 | 9 | 11 | 13 | 14 | 15 |
| Belo Horizonte UVI | 17 | 16 | 14 | 12 | 9 | 7 | 8 | 10 | 12 | 13 | 14 | 16 |
| Salvador UVI | 14 | 14 | 14 | 13 | 10 | 9 | 9 | 12 | 12 | 15 | 15 | 14 |
| Santo Amaro | 14 | 14 | 14 | 13 | 11 | 9 | 10 | 12 | 12 | 15 | 15 | 14 |
| Fortaleza UVI | 14 | 14 | 15 | 15 | 13 | 11 | 11 | 12 | 13 | 13 | 13 | 13 |