Last updated: July 2, 2025
Understanding the UV Index in Arinos, Brazil, is essential for safeguarding your skin against harmful ultraviolet radiation. With a tropical climate characterized by intense sunlight, knowing the UV levels can help you avoid sunburn and long-term skin damage while enjoying the outdoors. During peak hours, particularly between 11 AM and 2 PM, the UV Index in Arinos can soar to 9, signaling a very high risk of harm from unprotected sun exposure. Stay informed and protect your skin by monitoring the UV Index—your health deserves it!
The UV Index throughout the day showcases a sharp rise and fall, highlighting the sun's intensity. At 07:00, it starts gentle at 1, but by 09:00, it climbs to 4, signaling a need for some sun protection. The real peak occurs between 11:00 and 13:00, reaching a noteworthy 9—a time when sun safety is crucial. As the afternoon progresses, the index begins to drop to 7 by 14:00, before tapering off to 4 at 15:00. By 16:00, it further declines to 2, and the sun's impact wanes as evening approaches, hitting 1 at 17:00. By 18:00 and 19:00, it settles at 0, marking the end of the solar intensity for the day. Stay informed and protect your skin when the sun is at its strongest!
| 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 | 9 | very high | 15 min |
| 12:00 | 9 | 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 |
The UV Index experiences significant seasonal fluctuations, with the highest values typically occurring during the winter months. From January to March, the UV Index remains in the extreme range, peaking at 17 in January, indicating a very short burn time of just 10 minutes. As spring approaches, the values slightly decrease, but April still holds a high UV Index of 13. In May and June, the index drops to 10 and 9 respectively, categorized as very high, allowing for a slightly longer burn time of 15 minutes. The trend shifts back to extreme levels in August through November, with burn times reverting to 10 minutes. The high-risk months for UV exposure are January, February, March, August, September, and October. For residents and visitors, it is crucial to remain vigilant during these periods by seeking shade, wearing protective clothing, and applying sunscreen routinely, especially when the UV Index is forecasted to be high.
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 |
| Arinos | 17 | 15 | 14 | 13 | 10 | 9 | 9 | 12 | 13 | 14 | 15 | 16 |
| Fortaleza UVI | 14 | 14 | 15 | 15 | 13 | 11 | 11 | 12 | 13 | 13 | 13 | 13 |