Last updated: July 2, 2025
Understanding the UV Index in Vilhena, Brazil, is crucial for safeguarding your skin and overall health. With its tropical climate, Vilhena experiences significant UV exposure, particularly between the hours of 10 AM and 2 PM, when the UV Index reaches its peak at 10. Being aware of these levels is essential for preventing sunburn and long-term skin damage. By monitoring the UV Index, residents and visitors can take proactive steps to protect themselves from the dangers of excessive sunlight, ensuring a safer and more enjoyable experience in this vibrant region.
The UV Index throughout the day presents a compelling narrative of sun exposure, peaking at a staggering 10 at 12:00 PM, indicating a need for caution. As the sun rises, the UV Index gradually climbs from 1 at 7:00 AM to a notable 4 by 9:00 AM. The ascent continues, reaching 9 by 11:00 AM, before hitting its maximum at noon. However, as the afternoon progresses, the intensity wanes, with readings dropping to 7 by 2:00 PM and eventually falling to 1 by 5:00 PM. As twilight approaches, the Index dips to 0 after 6:00 PM, promising safe evening conditions. Engaging with the sun requires awareness; ensure you're protected during those peak hours!
| 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 | 7 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 7 | 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 |
Throughout the year, the UV Index remains notably high in this region, with extreme exposure levels observed from January to April, and again in August, September, October, and November. January through April consistently show a UV Index of 16, indicating a burn time of just 10 minutes. The high-risk months are confirmed to be January, February, March, April, August, September, October, and November, all falling within the extreme category. Residents and visitors are strongly advised to take precautionary measures during these months, including wearing protective clothing, applying broad-spectrum sunscreen, and seeking shade when outdoors, especially during peak sunlight hours. As the season progresses into the summer months of June and July, the UV Index slightly decreases to 10 but remains in the very high category, with an increased burn time of 15 minutes. Stay vigilant and prioritize sun safety year-round.
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 |
| 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 |
| Vilhena | 16 | 16 | 16 | 15 | 11 | 10 | 10 | 12 | 12 | 14 | 15 | 16 |