Last updated: May 3, 2025
In João Alfredo, Brazil, understanding the UV Index is crucial for safeguarding your skin health and preventing sunburn. The UV Index provides a daily forecast of the expected risk of overexposure to ultraviolet radiation from the sun, a key factor in avoiding skin damage and long-term health issues. Given João Alfredo's tropical climate, residents and visitors alike can face significant UV exposure, especially during peak hours when the index soars to a maximum of 12. By staying informed about UV levels, you can take proactive measures to protect yourself and enjoy the beautiful sunny days without the harmful consequences.
The UV Index throughout the day reveals a striking evolution in sun exposure, with maximum levels peaking at 12 around noon. Starting from a mild 2 at 7:00 AM, the index builds steadily, reaching 8 by 9:00 AM as the morning sun intensifies. Just after 10:00 AM, the UV Index surges to its highest point of 11, maintaining an extreme 12 from 11:00 AM to 12:00 PM—the perfect time for sun protection! As the afternoon unfolds, the index begins to drop, falling to 9 by 1:00 PM, then gently easing to 6 at 2:00 PM and finally tapering off to 3 by 3:00 PM. As evening approaches, the UV exposure significantly diminishes, with readings of 1 at 4:00 PM and 5:00 PM, and finally hitting 0 by 6:00 PM, ensuring a safe end to the sun-soaked day. Remember to stay protected during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 8 | very high | 15 min |
| 10:00 | 11 | extreme | 10 min |
| 11:00 | 12 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 9 | 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 throughout the year displays extreme levels, particularly from January through November, with values consistently between 12 and 15, indicating a high risk of harm from unprotected sun exposure. Notably, the highest UV Index occurs in March at 15, closely followed by February and April at 14. Visitors and residents should take special care during these high-risk months and consistently throughout the year, ensuring they wear appropriate sun protection, including sunscreen, hats, and UV-protective clothing. With a burn time of only 10 minutes, it is crucial to limit sun exposure, especially during midday when UV radiation is at its peak.
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 |
| Joao Alfredo | 14 | 14 | 15 | 14 | 12 | 11 | 11 | 12 | 13 | 13 | 14 | 14 |