Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Vianopolis, Brazil, where sun exposure can lead to significant skin health risks. Given its tropical climate, Vianopolis often experiences elevated UV levels, particularly between 10 AM and 2 PM, when the index peaks at 9—a level that can lead to severe sunburn in just minutes without proper protection. By staying informed about UV levels, you can take proactive steps to safeguard your skin, ensuring a healthier and more enjoyable outdoor experience in this beautiful Brazilian locale. Remember, protecting your skin is not just about avoiding sunburn; it’s a vital aspect of long-term health!
The UV Index for the day starts off low, with a maximum of 1 at 07:00 and 08:00, providing a gentle introduction to sunlight. As the morning progresses, it climbs gradually, peaking at 9 around 12:00, marking the sun's fierce midday intensity. The index remains high at 8 from 11:00 to 13:00, urging outdoor enthusiasts to seek shade and apply sunscreen. However, by the afternoon, the UV Index begins to taper off, declining to 4 at 15:00 and dropping further to 1 by 17:00, before finally hitting 0 in the evening. This fluctuation highlights the importance of being sun-smart, especially during those critical midday hours when UV exposure can be most damaging.
| 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 | 8 | very high | 15 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 6 | high | 25 min |
| 15:00 | 4 | moderate | 30 min |
| 16:00 | 2 | 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 significant fluctuations throughout the year, with extreme levels prevailing from January to April and again in October to December. High-risk months notably include January, February, and November, each reaching a peak UV Index of 16, while December hits 17. Visitors and residents should take extra precautions during these periods, as the burn time is a mere 10 minutes at these extremes. In contrast, May through July sees a slight decrease, with a very high UV Index of 10-9, allowing for a burn time of 15 minutes. However, caution is still advised, particularly in August and September when the index rises back to 12. It's essential for everyone to protect their skin by using sunscreen, wearing protective clothing, and seeking shade during peak sunlight hours, especially during these high-risk 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 |
| Vianopolis | 16 | 16 | 14 | 13 | 10 | 9 | 9 | 12 | 12 | 15 | 16 | 17 |