Last updated: July 2, 2025
In Barreirinhas, Brazil, staying informed about the UV Index is essential for both residents and visitors alike. With a tropical climate characterized by strong sun exposure, understanding UV levels can significantly impact your health, helping to prevent sunburn and long-term skin damage. During the day, particularly between 10:00 AM and 2:00 PM, the UV Index often reaches peak values of 11, indicating extreme risk to unprotected skin. Being aware of these UV fluctuations allows you to take proactive measures to protect yourself, ensuring that you can enjoy the natural beauty of Barreirinhas safely and healthily.
The UV Index today shows a striking progression through the hours. Starting the day with a mild 1 at 07:00, it quickly ramps up to 3 by 08:00, indicating that sun exposure is starting to become relevant. By 09:00, it reaches 5, marking the beginning of a more intense sun experience. The 10:00 hour brings a sharp increase to 8, while 11:00 and 12:00 peak at an impressive 11—signifying a very high risk of harm from unprotected sun exposure. As the afternoon continues, the index gradually dips, dropping to 10 at 13:00, then sliding to 8 by 14:00, before decreasing further to 4 at 15:00. The sun’s intensity wanes into the evening, falling to 2 at 16:00, and finally reaching 1 by 17:00. By 18:00 and beyond, the UV Index falls to 0, offering a reprieve from the sun’s rays as the day concludes. Always remember to stay protected during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 8 | very high | 15 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 |
Throughout the year, the UV Index remains consistently high, ranging from 11 to 16, categorized as extreme exposure. The high-risk months are predominantly from January to April, where the UV Index peaks at 16 in March. Even in the late summer and fall months, the UV Index maintains a level that can lead to skin damage within just 10 minutes of unprotected exposure. Therefore, it is crucial for both visitors and residents to take protective measures year-round, including wearing sunscreen, protective clothing, and sunglasses when outdoors, to mitigate harmful effects from 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 |
| 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 |
| Barreirinhas | 15 | 15 | 16 | 15 | 13 | 12 | 11 | 13 | 13 | 13 | 14 | 13 |