Last updated: June 2, 2025
In Quatro Barras, Brazil, staying informed about the UV Index is essential for maintaining your skin health and preventing sunburn. With the region's Cfb climate, which typically features mild summers and cool winters, UV exposure can still pose significant risks, especially during peak hours. Understanding the daily UV levels allows residents and visitors alike to make informed choices about sun safety, such as seeking shade during high UV times (12:00 PM to 1:00 PM when the index can reach 6) and applying sunscreen appropriately. Prioritizing UV awareness ensures a healthy balance of outdoor enjoyment while protecting your skin from potential harm.
The UV Index today showcased a notable increase from the early morning hours, starting at a gentle 1 at 07:00 and 08:00. As the sun rose higher in the sky, the index climbed steadily, reaching a significant 6 by 12:00, indicating a peak in UV radiation and the need for sun protection. The afternoon saw a slight decline, with values dropping to 4 at 14:00 and falling further to 2 by 15:00. As the day wound down, the UV index returned to a safer range, ending the day at 0 by 19:00. It’s crucial to stay informed and safeguard your skin during those high UV hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 4 | moderate | 30 min |
| 11:00 | 5 | moderate | 30 min |
| 12:00 | 6 | high | 25 min |
| 13:00 | 5 | moderate | 30 min |
| 14:00 | 4 | moderate | 30 min |
| 15:00 | 2 | low | 45 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 fluctuations, with the highest values occurring from January to April, where it consistently reaches extremes of 16 to 11, indicating a very high risk of harm from unprotected sun exposure; in these months, burn time is as brief as 10 minutes. As spring transitions to summer, the index decreases, peaking at 8 in May and then dropping to 6 from June to July, marking a high risk category with a slightly extended burn time of 25 minutes. However, August sees a rise back to 9 (very high), followed by a return to extreme levels in September and October. November and December maintain high values of 15, suggesting that extreme caution is needed year-round. Visitors and residents should prioritize sun protection during these high-risk months, applying sunscreen, wearing protective clothing, and seeking shade to reduce the risk of sunburn and long-term 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 |
| Quatro Barras | 16 | 15 | 13 | 11 | 8 | 6 | 6 | 9 | 11 | 14 | 15 | 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 |