Last updated: July 2, 2025
In Sao Miguel do Iguacu, Brazil, being aware of the UV Index is essential for protecting your skin health and preventing sunburn, particularly as the region enjoys a Cfa climate with considerable sun exposure throughout the year. Understanding UV levels helps you make informed decisions about outdoor activities, ensuring you take necessary precautions during peak hours when the index peaks at 6 between 12:00 and 13:00. With varied UV exposure risks throughout the day, from a low of 0 in the early morning to a moderate 5 later in the morning, it's crucial to stay informed and shield yourself effectively as you enjoy the beautiful landscapes and vibrant culture that Sao Miguel do Iguacu has to offer.
The UV Index throughout the day presents a dynamic picture of sun exposure. Starting from a maximum of 0 at 7:00 AM, the index gradually climbs, reaching 1 by 8:00 AM and reaching the moderate threshold of 3 by 10:00 AM. The peak UV exposure occurs between 12:00 PM and 1:00 PM, with levels hitting 6—a time to ensure adequate sunscreen application! As the afternoon progresses, the index gradually declines; it drops to 4 by 3:00 PM and then further decreases to 1 by 6:00 PM, before settling back to 0 at 7:00 PM. This pattern serves as a reminder to enjoy the sun with caution during peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 0 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 3 | moderate | 30 min |
| 11:00 | 5 | moderate | 30 min |
| 12:00 | 6 | high | 25 min |
| 13:00 | 6 | high | 25 min |
| 14:00 | 5 | moderate | 30 min |
| 15:00 | 4 | moderate | 30 min |
| 16:00 | 2 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, UV Index levels fluctuate significantly, posing varying risks for visitors and residents. The highest UV exposure occurs from January to March, where the UV Index reaches a maximum of 15, categorized as extreme, with a burn time of just 10 minutes. As we transition into April, the index drops to 10 (very high), allowing for slightly longer exposure at 15 minutes. Summer months (May to July) offer a high UV Index, averaging 6-7, prompting a burn time of 25 minutes. However, August and September see a return to very high levels with indices at 8 and 10, respectively. As the year closes, October to December presents yet another spike in extreme levels, peaking at 15 in November with burn times reverting to 10 minutes. Visitors and residents are advised to take precautionary measures, especially during the high-risk months of January, February, March, October, November, and December, by wearing protective clothing, applying sunscreen, and limiting sun exposure during peak hours to prevent skin damage.
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 Miguel do Iguacu | 15 | 15 | 13 | 10 | 7 | 6 | 6 | 8 | 10 | 13 | 15 | 14 |
| 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 |