Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors of Sao Roque, Brazil, where the Cfa climate brings warm summers and a high potential for UV radiation exposure. Being aware of UV levels helps in preventing sunburn and promoting long-term skin health, ensuring that everyone can enjoy the beautiful outdoor activities this vibrant city has to offer. With UV values peaking at 6 during midday hours, it's essential to take precautions to protect your skin from harmful effects, especially while basking in Sao Roque's sunny days. Stay informed, stay protected!
The UV Index throughout the day presents an interesting fluctuation, starting off quite low with a maximum of 1 at both 07:00 and 08:00. As the sun rises higher, the intensity increases sharply, peaking at 6 from 11:00 to 13:00. This is the critical time to protect your skin, as a UV Index of 6 indicates a moderate risk of harm from unprotected sun exposure. The afternoon sees a gradual decline, with numbers dropping back to 2 by 15:00 and returning to 1 by 16:00 and 17:00. Finally, as the day comes to a close, the UV Index falls to 0 by 18:00 and remains there through the evening, reminding us that while the sun's rays can be strong during the day, they also retreat as the sun sets.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 4 | moderate | 30 min |
| 11:00 | 6 | high | 25 min |
| 12:00 | 6 | high | 25 min |
| 13:00 | 6 | high | 25 min |
| 14:00 | 4 | moderate | 30 min |
| 15:00 | 2 | low | 45 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 experiences significant seasonal changes, peaking in the winter and late fall months, with extreme levels recorded from January through April and again in September to November. This means January, February, March, April, September, October, and November are considered high-risk months for sun exposure, with a burn time of only 10 minutes in these extreme conditions. In contrast, during the summer months of June and July, the UV levels drop to high, allowing for a slightly longer burn time of 25 minutes, while May and August remain at very high, with 15 minutes before potential damage occurs. Visitors and residents are advised to take precautions, such as wearing sunscreen, protective clothing, and seeking shade, especially during the peak months to minimize the risk of skin damage and ensure safe outdoor activities.
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 |
| Sao Roque | 16 | 15 | 13 | 11 | 8 | 6 | 7 | 9 | 11 | 13 | 15 | 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 |