Last updated: July 2, 2025
In Nova Iguaçu, Brazil, being aware of the UV Index is essential for maintaining skin health and preventing sunburns. Understanding UV levels can empower residents and visitors to make informed choices about sun protection, especially during the peak hours of exposure. With a tropical savanna climate characterized by intense sunlight, Nova Iguaçu sees significant UV risks, particularly between 10 AM and 2 PM, when values can reach a high of 7. By keeping an eye on the UV Index, you can enjoy the beautiful outdoors while safeguarding your skin from harmful effects!
The UV Index reveals an early morning reprieve, starting at a gentle 1 at 7:00 AM and remaining low through 9:00 AM. However, as the sun climbs, intensity increases sharply, peaking at a 7 around noon, signaling the most potent UV exposure of the day. The early afternoon maintains a respectable UV level of 6 at 1:00 PM before gradually tapering off. By mid-afternoon, it drops to 4, then swiftly declines to 1 by 4:00 PM, and finally settles at 0 by 6:00 PM, marking the day's end for UV concern. This hourly trend underscores the importance of sun safety during peak hours, especially between 10 AM and 2 PM.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 6 | 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nova Iguacu | 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 |