Last updated: August 1, 2025
In Anastacio, Brazil, understanding the UV Index is essential for everyone who enjoys the sun. With UV levels peaking at 8 around midday, awareness of these ratings is crucial for preventing sunburn and promoting long-term skin health. Located in a tropical climate zone, Anastacio experiences high UV exposure risks, particularly during the summer months. By staying informed about the daily UV Index, residents and visitors can take necessary precautions to protect their skin while enjoying outdoor activities under the Brazilian sun.
As the sun rises, the UV Index begins its ascent, starting at a gentle 1 by 7:00 AM. By 8:00 AM, it nudges up to 2, signaling a mild increase in UV exposure. The intensity heats up quickly, reaching a moderate 4 by 9:00 AM, before hitting its peak of 8 from 11:00 AM to 12:00 PM. This is the prime time for sun safety awareness! After noon, the UV Index gradually declines; by 3:00 PM, it recedes to 3, and as the day wanes, it drops significantly to 1 by 4:00 PM. By evening, UV levels have diminished, reaching 0 by 6:00 PM, offering a reprieve from the sun’s rays.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 6 | 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 |
Throughout the year, UV Index levels fluctuate significantly, with January through April consistently marked by extreme exposure, peaking at an index of 15 and a rapid burn time of just 10 minutes. The intensity slightly decreases in May, classified as very high with a UV Index of 9, where skin can begin to burn after 15 minutes of exposure. In the summer months of June and July, the UV Index remains elevated at 7 and 8, respectively, allowing for longer exposure times but still classified as high to very high. As we transition into fall, the UV index experiences a brief increase again in September and October, returning to the extreme category with burn times of 10 minutes. This pattern resurfaces into the colder months with November and December showing a concerning UV Index of 14 and 16, urging vigilance. Visitors and residents should remain mindful of sun protection measures, especially during peak months when UV radiation poses a significant risk. Regular application of sunscreen, wearing protective clothing, and seeking shade are essential, particularly from January to April and for brief periods in September, October, and December.
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 |
| Anastacio | 15 | 15 | 13 | 12 | 9 | 7 | 8 | 10 | 11 | 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 |