Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Piui, Brazil, as it serves as a vital indicator of the sun’s strength and the potential risk of skin damage. With the region's Cwa climate, Piui experiences intense sun exposure, particularly between 10:00 AM and 2:00 PM, when the UV Index peaks at levels 8, indicating a high risk of harm without proper protection. By staying informed about daily UV levels, you can effectively prevent sunburn and protect your skin health, ensuring a safer experience while enjoying the beautiful outdoors. Understanding the UV Index not only helps you safeguard your skin but also promotes a more enjoyable lifestyle in this sun-soaked destination.
The UV Index today showcases a dramatic shift as the sun climbs higher in the sky. Starting off at a low of 1 at 07:00, it gradually ascends to a moderate 3 by 09:00. The real intensity hits its peak at 11:00, reaching a high of 8, and maintaining that level until 13:00. Afterward, the index begins its descent, dipping to a 6 at 14:00. By late afternoon, it settles at a 3 by 15:00, before dropping quickly to 1 at 17:00 and finally fading to 0 by 19:00. Stay protected during the peak hours to enjoy a day under the sun safely!
| 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 | 8 | 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 | 2 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, the UV Index fluctuates significantly, with January to April showcasing extreme levels (UV Index of 12-16) and a minimal burn time of just 10 minutes. May marks a transition to a very high exposure category (UV Index of 9) with increased burn time of 15 minutes, while June and July see a slight reduction (UV Index of 7-8) but remain high risk, with burn times of 25 and 15 minutes, respectively. As summer shifts into early autumn, August and September revert to extreme levels, prompting a return to quick burn times of 10 minutes. October and November continue to exhibit extreme UV levels, ultimately peaking again in December. Visitors and residents should exercise caution during the high-risk months, particularly from January through April and again in August through November, always using appropriate sun protection measures and seeking shade during peak hours.
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 |
| Piui | 16 | 16 | 14 | 12 | 9 | 7 | 8 | 11 | 12 | 14 | 15 | 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 |