Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Maraba, Brazil, where the tropical climate brings with it significant sun exposure risks. With UV levels peaking at a remarkable 11 during midday hours, awareness of these fluctuations is vital for preventing sunburn and safeguarding skin health. High UV radiation can lead to serious skin issues over time, making it essential to stay informed about daily UV conditions. In Maraba's humid tropical climate, where sunny days are the norm, understanding the UV Index equips you with the knowledge to enjoy the outdoors safely while minimizing the risk of harmful effects from the sun.
At dawn, the UV Index begins its slow ascent at 07:00, peaking at a mild level of 1. As the morning progresses, a steady rise brings it to 2 by 08:00, and then it takes a significant leap to 4 by 09:00. The day reaches its UV intensity at 12:00 and 13:00, both clocking in at a powerful 11—a stark reminder to seek shade and wear protection. From this zenith, the index gradually declines, hitting 8 at 14:00 and easing to 6 by 15:00. As the sun begins its descent, the UV Index dwindles, rounding off the day at 3 at 16:00, before dropping to 1 by 17:00, 18:00, and finally fading to 0 at 19:00. This pattern highlights the essential need for sun safety during the midday hours when UV exposure peaks dramatically.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, the UV Index remains consistently high, with extreme exposure categories recorded from January through December. Notably, the highest UV Index of 15 occurs from January to March, making these months particularly high-risk for skin damage under prolonged sun exposure, with a burn time of just 10 minutes. April sees a slight decrease to 14 before tapering to 12 in late spring and summer (May to August). The index then stabilizes at 12 from September through October, before rising again to 14 in November and December. Given these statistics, it is essential for visitors and residents to take precautions year-round, such as wearing sunscreen, protective clothing, and seeking shade during the hottest parts of the day to mitigate the risks of sunburn and long-term skin damage.
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 |
| Maraba | 15 | 15 | 15 | 14 | 12 | 11 | 11 | 12 | 12 | 12 | 14 | 14 |