Last updated: May 3, 2025
Understanding the UV Index in São Sepé, Brazil, is crucial for safeguarding your health under the sun’s rays. With a Cfa climate that boasts warm summers and temperate winters, awareness of UV levels becomes essential to prevent sunburn and maintain healthy skin. The UV Index typically peaks between 12:00 PM and 1:00 PM, reaching levels of 6, indicating a moderate risk of harm from unprotected sun exposure. By keeping an eye on the UV Index, you can enjoy the beautiful weather in São Sepé while protecting yourself from the harmful effects of ultraviolet radiation.
As the sun rises, the UV Index remains low at 0 by 07:00, perfect for early risers. However, a gentle increase begins at 08:00, reaching 1 by the late morning. The real action starts at 10:00, when the index climbs to 3, peaking at 6 from 12:00 to 13:00. This midday high signals the time to take precautions, as the sun's rays are strongest. Despite a gradual decrease to 4 by 14:00, the UV intensity remains noticeable, dropping further to 3 at 15:00. By 16:00, it retreats to 2, then diminishes swiftly to 1 at 17:00 and back to 0 by 18:00. As night falls, the UV threat dissipates, marking a safe end to a day under the sun.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 0 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 3 | moderate | 30 min |
| 11:00 | 5 | moderate | 30 min |
| 12:00 | 6 | high | 25 min |
| 13:00 | 6 | high | 25 min |
| 14:00 | 4 | moderate | 30 min |
| 15:00 | 3 | 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 experiences significant seasonal fluctuations, peaking during the winter and late fall months. January, February, October, November, and December all reflect an extreme exposure category with UV Index values reaching 14 to 15 and a minimal burn time of just 10 minutes. March adds to this high-risk period with an index of 12. The spring month of April drops slightly to a very high exposure category with an index of 9 and a burn time of 15 minutes, while May sees a reduction to high (index of 6) and a longer burn time of 25 minutes. In the summer, the UV risk lowers somewhat, with June and July categorized as moderate (UV Index 4-5 and burn times of 30 minutes), but returns to high in August with an index of 7. September bounces back to very high at 9. It's essential for both visitors and residents to be aware that the highest risk months for UV exposure are from January to March and October to December. Protection against UV radiation, including using broad-spectrum sunscreen, wearing protective clothing, and seeking shade during peak hours, is highly recommended during these times to reduce the risk of skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sao Sepe | 14 | 14 | 12 | 9 | 6 | 4 | 5 | 7 | 9 | 12 | 14 | 15 |
| 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 |