Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Barreiras, Brazil, where the sun's relentless rays can significantly impact skin health. The UV levels in this tropical climate can soar to 10 around midday, emphasizing the need for vigilant sunburn prevention strategies. By being aware of the UV Index, individuals can protect themselves from harmful effects like skin damage and premature aging. With a climate characterized by hot temperatures and elevated UV exposure risks, knowing when to seek shade or apply sunscreen is essential for enjoying outdoor activities safely. Stay informed and safeguard your skin under the Brazilian sun!
As the sun rises, the UV Index begins its climb, starting at a modest 1 at 07:00. By 08:00, it gently increases to 2, signaling a day of strengthening rays. The intensity peaks around 12:00 with a striking 10, indicating the time for caution and sun protection. As midday passes, the index gradually declines, dropping to 6 at 14:00 before continuing its descent to 4 at 15:00. By 17:00, it returns to a safer 1, and eventually fades to 0 after 18:00, marking a gentle close to the day. This data underscores the importance of seeking shade and wearing sunscreen during the midday hours when the UV exposure is at its most intense.
| 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 | 10 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 6 | high | 25 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 |
The UV Index is at its highest levels from January through April, with values consistently reaching a peak of 16 during this period, indicating extreme exposure and a burn time of just 10 minutes. As May rolls in, the index drops to 12, but remains categorized as extreme. The trend shifts slightly in the summer months of June and July, where the UV Index is rated as very high at 10, allowing for a slightly longer burn time of 15 minutes. August sees a resurgence to 12, followed by September, which records a UV Index of 13. The year concludes with high values again from October to December, where the index returns to 15. Given these data, January to April and October to December are particularly high-risk months for UV exposure, and visitors and residents are advised to take proactive precautions, such as wearing sunscreen, protective clothing, and seeking shade, especially during peak sunlight 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 |
| 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 |
| Barreiras | 16 | 15 | 15 | 14 | 12 | 10 | 10 | 12 | 13 | 15 | 15 | 16 |