Last updated: July 2, 2025
Understanding the UV Index is crucial for safeguarding your skin health in Senador Guiomard, Brazil. As a tropical climate zone, residents and visitors alike face increased risks of sunburn and long-term skin damage due to high ultraviolet (UV) radiation levels, especially between 10 AM and 2 PM, when the UV Index can peak at an alarming 10. Being aware of these levels empowers you to take necessary precautions—whether it's seeking shade, applying sunscreen, or wearing protective clothing—ensuring that you can enjoy the sunny days safely while minimizing your risk of skin-related issues. Stay informed and protect yourself against the powerful sun's rays in your vibrant community!
As the sun rises, the UV Index starts low at 1 at 07:00, making it a safe time for early birds. By 08:00, it climbs to 3, indicating a slight increase in UV exposure. The peak arrives sharply at 11:00 and 12:00, hitting a maximum of 10—a strong reminder to wear sunscreen and seek shade. Following this, the index gradually decreases, dipping to 6 by 14:00 and dropping further to 3 by 15:00. As the day winds down, UV levels return to a comfortable 1 by 16:00, fading to 0 by 18:00. This hourly pattern emphasizes the importance of midday protection while reminding us of the sun's dynamic presence throughout the day.
| 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 | 8 | 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 extremely high levels from January to April, remaining consistently at 16, which means the burn time is only 10 minutes for unprotected skin. As the year progresses, UV exposure begins to slightly decline in June and July, dropping to 10 and entering the very high category with a burn time of 15 minutes. However, it rises again in August, peaking at 11, and remains extreme through September, October, and November, where the index varies from 12 to 15 but with a burn time of 10 minutes. Visitors and residents are advised to take precautionary measures during these high-risk months, particularly from January to April, ensuring they use sunscreen, wear protective clothing, and seek shade to minimize the risk of skin damage while enjoying outdoor activities.
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 Guiomard | 16 | 16 | 16 | 14 | 12 | 10 | 10 | 11 | 12 | 14 | 15 | 15 |