Last updated: May 3, 2025
Understanding the UV Index in Foz do Iguaçu, Brazil is crucial for protecting your skin and overall health, especially given the area's warm, humid climate. With typical UV levels peaking around midday, awareness of these levels is key to preventing sunburn and long-term skin damage. During the summer months, Foz do Iguaçu often experiences heightened UV exposure, making it essential to stay informed. Keep an eye on the UV Index to make informed decisions about sun safety while exploring this stunning region known for its breathtaking waterfalls and rich biodiversity.
Throughout the day, the UV Index showcases a dynamic pattern of intensity. Starting at a gentle 1 by 07:00, the index gradually rises, reaching a moderate 2 by 09:00. As the sun climbs higher, a notable increase occurs, peaking at an elevated 7 from 12:00 to 13:00, marking the day's most intense UV exposure. The index then begins its descent, dipping to 4 by 15:00 and further down to 2 by 16:00. As evening approaches, the UV risk diminishes, with values dropping to 0 at 18:00 and remaining low for the rest of the evening. It's essential to stay protected during those peak midday hours when UV exposure can be at its strongest!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 4 | moderate | 30 min |
| 11:00 | 6 | high | 25 min |
| 12:00 | 7 | high | 25 min |
| 13:00 | 7 | high | 25 min |
| 14:00 | 6 | 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, UV exposure levels significantly fluctuate, with January to April marking the highest risk months. The UV Index peaks at 15 in January, February, and November, categorizing these months within the extreme exposure category, where a burn can occur in just 10 minutes. Even in March and October, the UV Index remains dangerously high at 13 and 14, respectively. April experiences a slight decrease to a very high exposure level (UV Index 10), but May dips further to a high category (UV Index 7) with a burn time of 25 minutes. As summer arrives, June sees a moderate index of 5, gradually increasing to high levels again in July and August. Visitors and residents are strongly advised to take precautions during these high-risk months, such as wearing sunscreen, protective clothing, and sunglasses, while limiting sun exposure, especially during peak hours.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Foz do Iguacu | 15 | 15 | 13 | 10 | 7 | 5 | 6 | 8 | 10 | 13 | 15 | 14 |
| 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 |