Last updated: May 3, 2025
In Jose Bonifacio, Brazil, understanding the UV Index is crucial for safeguarding your skin against harmful ultraviolet rays. With a subtropical climate that often sees high UV levels, awareness of daily UV exposure can help prevent sunburn and long-term skin damage. During peak hours, particularly between 11:00 AM and 1:00 PM, the UV Index can reach levels as high as 8, indicating a very high risk of harm from unprotected sun exposure. By staying informed about UV levels, residents and visitors alike can take appropriate precautions to enjoy the beautiful Brazilian sun while protecting their skin health.
The UV Index is a crucial indicator of sun exposure throughout the day. Early morning hours see a gentle rise, with values peaking at 1 from 7:00 to 8:00 AM. As the sun climbs higher, the intensity elevates significantly; by 10:00 AM, the index jumps to 5, reaching a maximum of 8 between 11:00 AM and 1:00 PM—the perfect time for sunscreen application. As afternoon approaches, conditions begin to moderate, with a gradual decline to 6 at 2:00 PM, followed by further decreases to 4 at 3:00 PM and 2 at 4:00 PM. By 5:00 PM, the UV index drops to 1 and eventually reaches 0 by 6:00 PM, signaling the end of peak sun exposure. Staying aware of these fluctuations is essential for safe outdoor activities!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 6 | high | 25 min |
| 15:00 | 4 | 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 seasonal UV changes indicate that exposure levels are consistently high, particularly from January to April, where the UV Index remains in the extreme category, peaking at 16 in February and December. High-risk months include January, February, March, April, September, October, and November, as they all feature an extreme UV Index that can lead to sunburn in as little as 10 minutes. Conversely, the summer months of May, June, July, and August experience a drop to very high and high categories, with slightly longer burn times of 15 to 25 minutes. Visitors and residents should take precautions during all months, especially in extreme UV conditions, by seeking shade, wearing protective clothing, and applying broad-spectrum sunscreen to minimize the risk of skin damage.
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 |
| Jose Bonifacio | 15 | 16 | 13 | 11 | 8 | 7 | 8 | 10 | 12 | 14 | 14 | 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 |