Last updated: May 3, 2025
In Nilopolis, Brazil, staying informed about the UV Index is essential for safeguarding your skin and overall health. With the region's tropical climate, residents and visitors alike face heightened exposure risks to harmful ultraviolet radiation, especially during peak hours when UV levels can reach a maximum of 7. Understanding these levels is crucial for preventing sunburns and reducing long-term skin damage. With a typical daily pattern showing significant UV intensity from 10:00 AM to 2:00 PM, it’s important to take proactive measures to protect yourself while enjoying the sun. Embrace the beauty of Nilopolis but do so wisely by keeping a watchful eye on the UV Index!
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 |
The UV Index reveals significant seasonal variations in sun exposure risk throughout the year. January, February, and March experience extreme UV levels, with a high index of 15, 14, and 12, respectively, requiring minimal exposure of just 10 minutes before the risk of burning increases. As spring transitions into summer, April sees a decline to very high at 10, allowing for slightly longer exposure of 15 minutes. During May, June, and July, the index shifts to high, with longer burn times of 25 minutes. However, in August, it returns to very high at 9, prompting caution for 15 minutes of exposure. The fall months of September, October, and November see a resurgence in extreme levels (UV Index of 11, 12, and 13), demanding protective measures within 10 minutes of sun exposure. Finally, December revisits the peak at 15, maintaining the cycle of extreme risk. Visitors and residents should prioritize sun safety during these high-risk months, particularly from January to March and again in September to November, by using sunscreen, wearing protective clothing, and seeking shade to minimize the risk of UV-induced skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nilopolis | 15 | 14 | 12 | 10 | 7 | 6 | 7 | 9 | 11 | 12 | 13 | 15 |
| 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 |