Last updated: July 2, 2025
Understanding the UV Index is essential for residents and visitors in Senador José Porfirio, Brazil, where the tropical climate brings with it significant sun exposure risks. With UV levels often peaking at 11 during midday hours, awareness is crucial for preventing sunburn and protecting skin health. The dangerous peak typically occurs between 11:00 AM and 1:00 PM, making it vital to seek shade and apply sunscreen during these hours. By staying informed about the UV Index, you can enjoy the beautiful Brazilian sunshine while safeguarding your skin against the harmful effects of ultraviolet radiation.
The UV Index reveals a dynamic pattern throughout the day, starting at a low 1 in the early morning hours of 07:00 and 08:00. As the sun rises, the index climbs steadily, reaching 3 by 09:00. The midday sun peaks aggressively at 11, with the UV Index hitting its maximum of 11 from 12:00 to 13:00, signaling a high risk for skin damage without protection. Following this peak, values gradually decline, dropping to 9 at 14:00, and tapering down to 6 by 15:00. As the evening approaches, the UV Index falls back to 3 by 16:00 and finally descends to a 1 by 17:00 and 18:00, before sinking to 0 at 19:00, marking the end of the day's UV exposure. It's a reminder to stay vigilant under the sun, especially during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 6 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, the UV Index remains notably high, with values reaching extreme levels from January to April, peaking at a UV Index of 16. March and April are particularly concerning; however, the trend slightly decreases in May, where the Index drops to 13. June through September maintains a high UV risk, stabilizing around 11 to 12. October to December sees a gradual rise back to 13, indicating that the danger of skin damage from UV exposure persists. Visitors and residents are strongly advised to take precautions year-round, especially during the high-risk months of January through April. When outdoors, it is crucial to wear protective clothing, seek shade, and apply sunscreen diligently, as burn times can be as short as 10 minutes across all months.
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 |
| Fortaleza UVI | 14 | 14 | 15 | 15 | 13 | 11 | 11 | 12 | 13 | 13 | 13 | 13 |
| Senador Jose Porfirio | 15 | 15 | 16 | 16 | 13 | 11 | 11 | 12 | 12 | 12 | 13 | 13 |