Last updated: June 2, 2025
Understanding the UV Index is essential for the residents of Anastacio, Brazil, where the tropical climate brings intense sunlight and varying UV exposure throughout the day. This awareness is crucial for preventing sunburn and protecting skin health from the harmful effects of ultraviolet radiation. With peak UV levels reaching 7 between 11:00 AM and 12:00 PM, it’s important for locals and visitors alike to be mindful of sun safety measures. In Anastacio, where the weather is predominantly sunny, grasping the nuances of UV levels can help ensure that everyone enjoys the outdoors while safeguarding their well-being.
As the day unfolds, the UV Index reaches its peak during the late morning and early afternoon hours. Starting at a mild 1 at 7 AM, the index gradually climbs to a more noticeable 7 by 11 AM, signaling a time when sun protection becomes essential. It holds steady at 7 until noon, then begins to decline, dipping to 4 by 2 PM, and further falling to 1 by 4 PM. By evening, the UV Index drops to 0, indicating a safe time to enjoy the outdoors without the worry of harmful UV exposure. Remember, during the peak hours from 10 AM to 2 PM, it's crucial to wear sunscreen and protective clothing to safeguard your skin!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 6 | high | 25 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 7 | high | 25 min |
| 13:00 | 6 | high | 25 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 |
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 |