Last updated: May 3, 2025
Understanding the UV Index in Belém de São Francisco, Brazil is crucial for safeguarding your skin against harmful ultraviolet radiation. With the region's BSh climate, characterized by hot and sunny conditions, it's essential to be aware of UV levels to prevent sunburn and protect long-term skin health. The UV Index regularly peaks at an impressive 12 around midday, indicating a very high risk of harm from unprotected sun exposure. By being informed about these fluctuations, you can take proactive measures to enjoy the outdoors safely while minimizing the risk of skin damage.
As the day begins, the UV Index gradually climbs, starting at a modest 2 by 7:00 AM. By 9:00 AM, it surges to 7, signaling the onset of midday sun intensity. The peak occurs at 11:00 AM and 12:00 PM, where it reaches 12, urging everyone to seek shade and apply sunscreen. By 1:00 PM, it drops slightly to 10, but remains significant until the afternoon. As the sun begins its descent, the UV Index decreases to 7 at 2:00 PM, then quickly falls to 3 by 3:00 PM. By 4:00 PM, it dwindles to 1, and eventually drops to 0 by 6:00 PM, marking the end of a high UV intensity day. Remember, protecting your skin is essential, especially during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 2 | low | 45 min |
| 08:00 | 4 | moderate | 30 min |
| 09:00 | 7 | high | 25 min |
| 10:00 | 10 | very high | 15 min |
| 11:00 | 12 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 7 | 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 |
The UV Index reveals a significant seasonal variation in ultraviolet exposure, with the peak occurring from March to November, where values consistently remain in the extreme category. Notably, the months of January, February, March, April, July, August, and November exhibit particularly high UV levels, often reaching or exceeding 14. High-risk months for UV exposure include March, November, and April, when the Index peaks at 15, indicating an urgent need for protective measures. Visitors and residents alike are strongly advised to take precautions during these months, such as wearing protective clothing, using broad-spectrum sunscreen, and minimizing sun exposure, especially during peak 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 |
| Belem de Sao Francisco | 14 | 14 | 15 | 14 | 12 | 10 | 11 | 12 | 13 | 14 | 15 | 14 |