Last updated: July 2, 2025
Understanding the UV Index in Sao Caetano de Odivelas, Brazil, is crucial for safeguarding your skin health and preventing sunburn. With the region's tropical climate, where the sun can be particularly intense, awareness of UV levels can help you make informed decisions about outdoor activities. During midday hours, the UV Index in Sao Caetano can soar to a significant 12, indicating a high risk of harm from unprotected sun exposure. By recognizing these levels, you can take essential precautions to enjoy the sun responsibly—protecting not just your skin, but your overall well-being.
The UV Index throughout the day exhibits a striking pattern of intensity and decline. Starting the morning at a mere 1 at 7:00 AM, the sun's rays gradually gain strength, reaching a moderate 4 by 9:00 AM. The peak intensity hits an impressive 12 at noon, making 12:00 PM the prime time for sun exposure, which is crucial for vitamin D. As the afternoon progresses, the index begins to taper off, with 11 at 1:00 PM and gradually decreasing to 6 by 3:00 PM. The evening brings a soothing end, with a return to 1 by 5:00 PM and finally dropping to 0 by 7:00 PM. This data underscores the importance of sun safety, particularly during the midday hours when the UV exposure is at its highest.
| 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 | 8 | very high | 15 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The annual UV Index exhibits extreme levels from January to May, peaking at a UV Index of 16 during both March and April, making these months particularly high-risk for sunburn with a burn time of just 10 minutes. Although there is a slight decrease in June and July, the UV Index remains significant, hovering around 12 to 13 through the late summer and into the fall. As such, visitors and residents are advised to take proactive precautions during these high-risk months, including wearing broad-spectrum sunscreen, protective clothing, and seeking shade, especially during peak sun hours. Awareness of these seasonal UV changes is crucial for outdoor safety 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 |
| Fortaleza UVI | 14 | 14 | 15 | 15 | 13 | 11 | 11 | 12 | 13 | 13 | 13 | 13 |
| Sao Caetano de Odivelas | 14 | 15 | 16 | 16 | 14 | 12 | 12 | 13 | 13 | 13 | 13 | 13 |