Last updated: July 2, 2025
In Catu, Brazil, staying informed about the UV Index is crucial for protecting your skin and overall health. With the region's tropical climate, residents and visitors must understand the daily fluctuations in UV levels to prevent sunburn and long-term skin damage. During peak hours, particularly between 10 AM and 2 PM, the UV Index can soar as high as 10, indicating a very high risk of harm from unprotected sun exposure. By monitoring these levels, you can take proactive steps to enjoy the sun safely while keeping your skin healthy.
The UV Index throughout the day showcases a notable peak from 11:00 AM to 12:00 PM, where it reaches a high of 10, indicating very high levels of UV radiation and a strong need for sun protection. This intense sunlight starts to build up at 9:00 AM with a reading of 5, escalating to 8 by 10:00 AM. As the afternoon unfolds, the index gradually declines, dropping to 6 at 2:00 PM, followed by a significant decrease back to 3 by 3:00 PM. By the evening, the UV levels return to safe numbers, tapering off to 1 at 4:00 PM and 0 by 6:00 PM, prompting a welcome end to the day’s sun exposure. Always remember to take precautions during those peak hours!
Time | UVI | Category | Time to Burn |
---|---|---|---|
07:00 | 1 | low | 45 min |
08:00 | 3 | moderate | 30 min |
09:00 | 5 | moderate | 30 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 extreme levels throughout most of the year, with particularly high-risk months occurring from January to April, where the Index consistently reaches 14, requiring just 10 minutes of exposure before burning occurs. Although there is a slight reduction in June and July with a UV Index of 9 and 10, respectively, the risk remains very high, with a burn time of 15 minutes. From August to November, the UV Index rises again, reaching levels of 12 to 15, and maintaining a burn time of 10 minutes in most cases. Given these seasonal fluctuations, it is crucial for both visitors and residents to take protective measures such as applying sunscreen, wearing protective clothing, and seeking shade during peak hours to minimize skin damage from 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 |
Catu | 14 | 14 | 14 | 13 | 11 | 9 | 10 | 12 | 12 | 14 | 15 | 14 |
Fortaleza UVI | 14 | 14 | 15 | 15 | 13 | 11 | 11 | 12 | 13 | 13 | 13 | 13 |