Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Sao Cristovao, Brazil, where the sun's intensity can pose significant health risks, especially during peak hours. With the typical tropical climate of this region, knowing the UV levels helps you take proactive measures against sunburn and maintains overall skin health. The UV Index can reach a maximum of 10 between 11:00 AM and 12:00 PM, indicating an elevated risk for harm from unprotected sun exposure. Whether you’re enjoying the outdoors or simply going about your day, staying informed about UV exposure will help you safeguard your skin and enjoy the beautiful Brazilian sun safely.
As the sun rises, the UV Index starts low at 1 at 07:00, making it a safe time for early birds. By 08:00, it climbs to 3, indicating a slight increase in UV exposure. The peak arrives sharply at 11:00 and 12:00, hitting a maximum of 10—a strong reminder to wear sunscreen and seek shade. Following this, the index gradually decreases, dipping to 6 by 14:00 and dropping further to 3 by 15:00. As the day winds down, UV levels return to a comfortable 1 by 16:00, fading to 0 by 18:00. This hourly pattern emphasizes the importance of midday protection while reminding us of the sun's dynamic presence throughout the day.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 8 | 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 |
Throughout the year, the UV index in this region remains consistently high, with several months categorized as extreme exposure. The high-risk months for sun exposure are from January to April, and then again in August and October, where the UV index consistently reaches levels of 14 or 13, leading to a very short burn time of just 10 minutes. Visitors and residents are strongly advised to take necessary precautions during these months, such as wearing protective clothing, applying a high-SPF sunscreen, and seeking shade to minimize the risk of skin damage. June and July present slightly lower UV indices at 10, but caution is still warranted due to the very high exposure category, with a burn time of 15 minutes. Staying aware of the UV levels and taking proactive measures is essential for maintaining skin health year-round.
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 |
| Sao Cristovao | 14 | 14 | 14 | 13 | 11 | 10 | 10 | 12 | 13 | 14 | 14 | 14 |
| Fortaleza UVI | 14 | 14 | 15 | 15 | 13 | 11 | 11 | 12 | 13 | 13 | 13 | 13 |