Last updated: May 3, 2025
In Marechal Floriano, Brazil, understanding the UV Index is essential for protecting your skin and overall health. With the region's Aw climate typically bringing bright, sunny days, being aware of UV levels can help you prevent sunburn and long-term skin damage. During peak hours, especially between 10:00 AM and 2:00 PM, UV Index levels can reach as high as 9, indicating a very high risk for harm from unprotected sun exposure. By monitoring these levels, residents can make informed decisions about sun safety, ensuring that they enjoy the beautiful Brazilian sunshine while minimizing the risks associated with high UV exposure.
As the sun climbs higher in the sky, the UV Index reaches its peak during midday, showcasing a striking pattern in the hourly data. Starting at a modest 1 by 07:00, it gradually escalates, hitting 2 by 08:00. The intensity continues to rise, peaking at a formidable 9 by both 11:00 and 12:00—a clear invitation to slather on the sunscreen! As the afternoon progresses, the index begins to decline, dropping to 7 at 13:00, and gently tapering off to 3 by 15:00. By late afternoon and into the evening, the UV threat recedes, plummeting to 1 at 16:00, and finally fading into 0 from 18:00 onward. This hourly journey underscores the importance of sun safety at its zenith!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 7 | high | 25 min |
| 14:00 | 5 | moderate | 30 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 exhibits significant seasonal changes, with the highest levels recorded from January to April, where it remains in the extreme category between 16 to 12, resulting in a very short burn time of just 10 minutes. This trend continues with September to December, again reaching extreme levels. The high-risk months for UV exposure are therefore January, February, March, April, September, October, November, and December. In the spring and summer, the index drops slightly, entering the very high category in May and July, where the burn time increases to 15 minutes, and the high category in June with a burn time of 25 minutes. Visitors and residents should take precautions year-round, particularly in high-risk months by wearing protective clothing, using broad-spectrum sunscreen, and seeking shade to minimize 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 |
| Marechal Floriano | 16 | 15 | 14 | 12 | 9 | 7 | 8 | 10 | 12 | 14 | 15 | 16 |
| 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 |