Last updated: July 2, 2025
In Alto Piquiri, Brazil, awareness of the UV Index is crucial for protecting your skin and overall health. Understanding these levels not only helps in preventing painful sunburns but also plays a significant role in long-term skin health. With a subtropical Cfa climate, residents and visitors alike face varying UV exposure risks, particularly during peak hours when the index can soar to 7. This makes it essential to be informed about daily UV levels to enjoy the sun safely and effectively.
As the sun rises at 07:00, the UV Index starts off at a safe 0, perfect for those early morning routines. By 08:00, it nudges up to 1, indicating minimal risk. However, by 09:00, the intensity picks up to 2, signaling a gentle reminder to apply sunscreen if you're heading outdoors. The UV levels reach their peak at 12:00 and 13:00, soaring to a robust 7, which calls for careful sun protection measures. As the afternoon unfolds, the index gradually declines—6 at 14:00, then tapering to 4 by 15:00. The sun begins its descent, dropping back to 2 by 16:00 and further dwindling to 1 at 17:00 before finally retreating to 0 by 18:00 and into the evening. It's a beautiful day, but remember, the sun's rays are strongest during midday!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 0 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 4 | moderate | 30 min |
| 11:00 | 5 | moderate | 30 min |
| 12:00 | 7 | high | 25 min |
| 13:00 | 7 | high | 25 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 reveals significant seasonal variations in sun exposure, with January through April presenting the highest risk, all classified as extreme with an index of 11 to 15 and a quick burn time of just 10 minutes. May marks a slight decrease in risk to a very high category, allowing for 15 minutes of exposure before burning. From June to July, the risk lessens further to a high category with a burn time extending to 25 minutes. However, August sees an increase back to a very high index. In September, October, November, and December, the UV levels again rise to extreme, warning of quick burn times. Given these fluctuations, it is crucial for visitors and residents to take precautions, particularly between January and April and in September to October, by seeking shade, wearing protective clothing, and applying sunscreen regularly to safeguard against harmful UV radiation.
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 |
| Alto Piquiri | 15 | 14 | 13 | 11 | 8 | 6 | 7 | 9 | 11 | 13 | 15 | 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 |