Last updated: June 2, 2025
Awareness of the UV Index is crucial for residents and visitors in Sao Desiderio, Brazil, given the region's warm Aw climate and high sun exposure. Understanding UV levels not only helps in preventing painful sunburns, but it also plays a vital role in maintaining long-term skin health. With peak UV Index values soaring to 10 around midday, it's essential to stay informed about daily UV threats and practice safe sun habits to protect your skin while enjoying the beautiful Brazilian sunshine.
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 |
| Sao Desiderio | 16 | 15 | 15 | 14 | 12 | 10 | 10 | 12 | 13 | 15 | 15 | 16 |