Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors of Rio Largo, Brazil, a region known for its vibrant sun and tropical climate. The UV levels in this area can soar, particularly between 10 AM and 1 PM, with a peak index hitting 12—indicating a very high risk of harm from unprotected sun exposure. Awareness of these UV levels not only helps in taking precautions against sunburn, but also plays a significant role in protecting skin health and reducing the long-term risks of skin damage. Given Rio Largo's typical climate conditions, understanding the UV Index can empower you to enjoy the outdoors safely while minimizing potential health issues from excessive sun exposure.
The UV Index shows a dramatic rise throughout the morning and peaks around 11:00 AM at a striking 12, indicating a high risk of harm from unprotected sun exposure. By 10:00 AM, the index reaches 10, emphasizing the need for sun protection during this timeframe. However, as the afternoon progresses, the UV levels begin to decline, descending to 5 by 2:00 PM and further dropping to 1 by 4:00 PM, before plummeting to 0 after 6:00 PM. For those planning outdoor activities, it’s essential to stay vigilant and protect your skin, especially between 10:00 AM and 2:00 PM, when the sun's rays are at their strongest. Stay safe and enjoy the sun wisely!
| 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 | 11 | extreme | 10 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 5 | moderate | 30 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 experiences significant seasonal changes, indicating the intensity of ultraviolet radiation and its potential health risks. During the winter months (January to March) and early spring (April), the UV Index remains consistently high at 14, classified as extreme, with a quick burn time of just 10 minutes. As summer approaches, particularly in June and July, the UV Index drops slightly to 10, categorized as very high, allowing for a slightly longer burn time of 15 minutes. However, in late summer to early fall (August to October), the Index rebounds to extreme levels again, peaking at 13 in September and October. Notably, November and December revert to extreme UV levels of 14. Given these high UV readings, visitors and residents are strongly advised to exercise caution, wearing protective clothing, applying broad-spectrum sunscreen frequently, and seeking shade, especially during peak hours from 10 a.m. to 4 p.m.
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 |
| Rio Largo | 14 | 14 | 14 | 14 | 12 | 10 | 10 | 12 | 13 | 13 | 14 | 14 |
| Fortaleza UVI | 14 | 14 | 15 | 15 | 13 | 11 | 11 | 12 | 13 | 13 | 13 | 13 |