Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors in Cantagalo, Brazil, where the subtropical climate can lead to significant sun exposure. By being aware of the UV levels, you can effectively prevent sunburn and protect your skin health. With UV Index values peaking at 8 during midday, it’s essential to take precautions, especially in the warmer months when the sun’s intensity is stronger. Whether you're enjoying outdoor activities or just soaking in the beauty of Cantagalo, knowing what to expect from the UV Index can help you stay safe and healthy under the sun.
As the sun rises, the UV Index begins its ascent, starting at a gentle 1 by 7:00 AM. By 8:00 AM, it nudges up to 2, signaling a mild increase in UV exposure. The intensity heats up quickly, reaching a moderate 4 by 9:00 AM, before hitting its peak of 8 from 11:00 AM to 12:00 PM. This is the prime time for sun safety awareness! After noon, the UV Index gradually declines; by 3:00 PM, it recedes to 3, and as the day wanes, it drops significantly to 1 by 4:00 PM. By evening, UV levels have diminished, reaching 0 by 6:00 PM, offering a reprieve from the sun’s rays.
| 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 | 8 | very high | 15 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 |
The UV Index exhibits significant seasonal fluctuations, with extreme levels observed from January to April, where the index peaks at 16 in both January and December. These months, along with March (UV Index 13) and November (UV Index 14), represent high-risk periods for sun exposure, with a skin burn time as short as 10 minutes. In May, the UV Index drops to 8, categorized as very high, extending burn time to 15 minutes, while June sees a further decrease to a high level of 6 with a burn time of 25 minutes. However, the risk increases again in July and August, both categorized as very high, where burn times return to 15 minutes. To ensure safety, it is crucial for visitors and residents to take protective measures during these high-risk months, particularly between January and April and again in September and October, when the UV Index remains extreme. Utilizing sunscreen, wearing protective clothing, and seeking shade during peak hours are essential practices for minimizing UV exposure throughout the year.
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 |
| Cantagalo | 16 | 15 | 13 | 11 | 8 | 6 | 8 | 10 | 12 | 13 | 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 |