Last updated: August 1, 2025
Understanding the UV Index is crucial for everyone in Goiana, Brazil, where the combination of a tropical climate and high levels of sun exposure can lead to significant skin health risks. As UV levels peak during midday, reaching an intense index of 11 around 11:00 AM, it’s essential to be aware of the potential for sunburn and longer-term skin damage. By monitoring the UV Index, residents can make informed decisions about sun protection, ensuring they enjoy outdoor activities while safeguarding their skin health. With Goiana's warm, sunny weather offering ample opportunities for enjoyment, being mindful of these UV levels is key to staying safe under the sun.
At dawn, the UV Index starts at a mild 2 at 07:00, gradually rising as the sun ascends. By 09:00, it reaches a moderate 7, but the real peak comes at 11:00 with a striking 11, indicating a significant risk of harm from unprotected sun exposure. As the clock ticks toward noon, the index slightly dips to 10 at 12:00, then descends through the afternoon to 6 by 14:00, showcasing a steady decline. The intensity softens further, dropping to 3 at 15:00, and nearly fading out by evening, falling to 1 by 16:00 and diminishing to 0 by 19:00. It’s a reminder to protect your skin during 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 |
| Goiana | 14 | 14 | 15 | 14 | 12 | 11 | 11 | 12 | 13 | 13 | 14 | 14 |
| Fortaleza UVI | 14 | 14 | 15 | 15 | 13 | 11 | 11 | 12 | 13 | 13 | 13 | 13 |