Last updated: May 3, 2025
Understanding the UV Index is crucial for protecting your skin in Sao Fidelis, Brazil. With its tropical climate and high UV exposure, especially between 10 AM and 2 PM, being aware of the UV levels can help you prevent sunburn and long-term skin damage. During peak hours, the UV Index can reach as high as 8, signaling a serious risk for harm, while even lower levels later in the day still necessitate caution. By staying informed about UV Index readings, you can take proactive steps to safeguard your skin and enjoy the sun safely!
As the sun rises, the UV Index begins its climb, starting at a mild 1 at 07:00. By 08:00, it nudges up to 2, but the real surge begins as we approach midday. At 09:00, it reaches 4, and by 10:00, it hits 6—a clear sign to apply that sunscreen! The peak UV intensity occurs from 11:00 to 12:00, where it soars to an impressive 8, making it crucial to seek shade and wear protective clothing. As the afternoon rolls in, the index gradually decreases—7 at 13:00, 5 at 14:00, before plunging to 2 by 15:00. Finally, from 16:00 to 19:00, the UV Index dwindles down to 1 and finally 0, marking the end of a day where sun safety was paramount during those peak hours. Stay vigilant under the sun!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 6 | high | 25 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 7 | high | 25 min |
| 14:00 | 5 | moderate | 30 min |
| 15:00 | 2 | low | 45 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 distinct seasonal changes, with the highest levels occurring in the winter months. From January to April, the UV Index remains in the extreme exposure category, peaking at 16 in January and gradually decreasing to 11 in April, leaving individuals with a burn time of just 10 minutes. As summer approaches, the index drops to 6 in June and stabilizes at 8 to 9 during July and August, classified as very high exposure, extending burn time to 15 minutes. In September, the UV Index surges back to 12, indicating extreme risk once again, and remains high through to November, where it reaches 14. Following this pattern, visitors and residents should take extra precautions during these high-risk months, particularly from January to April and again in September to November, by wearing sunscreen, protective clothing, and seeking shade during peak sun hours to minimize the risk of skin damage.
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 |
| Sao Fidelis | 16 | 15 | 13 | 11 | 8 | 6 | 8 | 9 | 12 | 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 |
| Fortaleza UVI | 14 | 14 | 15 | 15 | 13 | 11 | 11 | 12 | 13 | 13 | 13 | 13 |