Last updated: July 2, 2025
In Visconde do Rio Branco, Brazil, understanding the UV Index is essential for protecting your skin and overall health. With a climate characterized as Aw (tropical savanna), residents and visitors alike must be mindful of the UV exposure risks, particularly during peak hours when the index can reach 8 around noon. By staying informed about UV levels, you can take proactive measures to prevent sunburn and long-term skin damage, ensuring a safer and more enjoyable experience under the sun. Whether you're enjoying outdoor activities or simply soaking up the rays, keeping an eye on the UV Index is crucial for maintaining your skin health.
As the sun rises, the UV Index begins its gradual ascent, peaking sharply at 12:00 PM with a striking 8—a reminder of the midday sun's intensity. Starting the day at a gentle 1 at 07:00, it climbs steadily to reach 6 by 10:00 AM, encouraging outdoor enthusiasts to stay protected. The climax arrives at 11:00 AM with a 7, followed closely by the height of 8 at noon. As the afternoon progresses, the UV level gracefully declines, dipping to 5 by 2:00 PM, then significantly dropping to 3, 1, and finally 0 after 6:00 PM. This data underscores the importance of sun safety during peak hours, particularly between 11:00 AM and 1:00 PM, when the UV risk is at its highest—so ensure you’re well-shielded during these critical times!
| 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 | 6 | high | 25 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 7 | high | 25 min |
| 14:00 | 5 | moderate | 30 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 |
Throughout the year, the UV Index experiences significant fluctuations, with extreme levels observed from January to April and again in September to November, where the burn time is a mere 10 minutes. The highest risk months are January, February, and December, with indices peaking at 17 during January and 16 in December. From May to August, while the indices remain high, they moderate to very high, allowing for slightly longer burn times of 15 to 25 minutes. Visitors and residents should take precautionary measures during these high-risk months, such as wearing protective clothing, using broad-spectrum sunscreen, and seeking shade, especially during midday hours when UV exposure 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 |
| Visconde do Rio Branco | 17 | 15 | 14 | 12 | 9 | 7 | 8 | 10 | 12 | 14 | 14 | 16 |
| 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 |