Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Ribeirao Bonito, Brazil, where the warm Cfa climate brings ample sunshine and occasional risks. As UV levels can spike dramatically—reaching as high as 8—awareness becomes key in preventing sunburn and protecting skin health. With midday sun exposure posing the highest threat, being informed about UV levels helps locals enjoy the outdoors safely while minimizing the risk of long-term skin damage. Stay vigilant and safeguard your skin while soaking up the beautiful Brazilian sun!
At sunrise, the UV Index begins at a gentle 1 at 07:00, rising gradually as the sun climbs higher. By 09:00, it reaches 3, indicating a moderate level of UV radiation. The heat of the day peaks at 12:00 with a high of 8, suggesting it’s time to seek shade or apply sunscreen. As the afternoon progresses, the index slightly drops to 7 at 13:00 and continues to decline, settling at 3 by 15:00. As the sun starts to set, the risk diminishing to 1 at 17:00 and finally dropping to 0 by 18:00, signaling a safer time for outdoor activities as the day winds down. Be mindful of the midday sun to protect your skin!
| 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 | 7 | high | 25 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 7 | high | 25 min |
| 14:00 | 6 | high | 25 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 shows significant seasonal fluctuations, with the highest values typically between January and April, where the index remains in the extreme category (ranging from 15 to 16) and a quick burn time of just 10 minutes. This trend continues into September and October, maintaining extreme levels. May sees a shift to very high (UV Index 8) and a slightly longer burn time of 15 minutes, while June to August presents lower but still concerning values, categorized as high and very high (up to 10), with burn times extending to 25 minutes. November and December revert to extreme levels. Visitors and residents are advised to take necessary precautions during these high-risk months, particularly from January to April and again in September to November, by wearing protective clothing, applying sunscreen frequently, and limiting 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 |
| Ribeirao Bonito | 15 | 16 | 13 | 11 | 8 | 7 | 8 | 10 | 11 | 13 | 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 |