Last updated: July 2, 2025
Awareness of the UV Index in Penha, Brazil, is crucial for maintaining healthy skin and preventing sunburn. Understanding daily UV levels helps residents and visitors alike make informed decisions about sun protection, especially during peak exposure times. With a Cfa climate, characterized by warm summers and mild winters, Penha experiences significant UV radiation, particularly around midday when the index reaches levels of 5. By being mindful of these UV risks, you can enjoy the beautiful outdoors while keeping your skin safe and healthy.
The UV Index throughout the day showcases an engaging pattern of intensity. Starting from a gentle 1 at 07:00 and 08:00, it gradually climbs, hitting 2 at 09:00. By 10:00, the index reaches 3, signaling a moderate risk for sun exposure. The sun’s intensity peaks between 11:00 and 13:00, peaking at a strong 5, urging everyone to take necessary precautions. As the afternoon progresses, the index slightly dips to 4 at 14:00, before tapering down to 3 at 15:00. As the sun begins to set, the UV levels descend, hitting 1 by 16:00, and finally dropping to 0 by 18:00, offering a soothing end to the day. It’s a reminder to enjoy the sun wisely, especially during those midday hours!
| 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 | 3 | moderate | 30 min |
| 11:00 | 5 | moderate | 30 min |
| 12:00 | 5 | moderate | 30 min |
| 13:00 | 5 | moderate | 30 min |
| 14:00 | 4 | moderate | 30 min |
| 15:00 | 3 | moderate | 30 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 experiences notable fluctuations throughout the year, with the highest levels recorded during the winter months and a gradual decrease into the summer. January, February, and March consistently display extreme UV levels, peaking at 15, which indicates an urgent need for protective measures—10 minutes of sun exposure can result in burns. As April arrives, the UV Index drops slightly to 10 but remains within the very high category, allowing for a 15-minute burn time. The summer months of June and July see a moderate UV Index of 5, offering more leeway with a burn time of 30 minutes. However, as August and September return to very high levels, with indices of 8 and 10, the risk of sun damage reemerges, demanding attention to sun protection in just 15 minutes. This trend continues into October and November, where UV readings climb back to extreme levels. Residents and visitors alike should take care during January to March and October to November, as these months are particularly high-risk for UV exposure. It's advisable to wear protective clothing, apply sunscreen regularly, and seek shade during peak sunlight hours to mitigate potential harm from the sun's rays.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Penha | 15 | 14 | 12 | 10 | 7 | 5 | 5 | 8 | 10 | 12 | 14 | 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 |