Last updated: July 2, 2025
Understanding the UV Index in Rosais, Portugal is crucial for anyone who enjoys the beautiful sun-drenched days this coastal town has to offer. With UV levels peaking at a significant 10 during midday, awareness of these readings is vital for sunburn prevention and maintaining healthy skin. The climate in Rosais, categorized as Csb, brings a unique interplay of sun and shade, making it essential to stay informed about UV exposure risks throughout the day. By grasping the implications of the UV Index, you can better protect yourself and enjoy the sunny weather safely!
As the sun rises, the UV Index begins its climb, starting at just 1 at 07:00 and 08:00, making it safe to enjoy some early morning activities. By 09:00, it reaches 2, hinting at the day's potential. But it’s at 10:00 that the UV Index really picks up, soaring to 4 as the sun ascends. The peak intensity occurs between 12:00 and 14:00, where it hits a sizzling 10—a clear signal to seek shade and wear sunscreen! After this zenith, the UV levels gradually dip, falling to 8 by 16:00, then to 5 at 17:00, and finally tapering off to 2 by 19:00. Embrace some caution during those midday hours, as the sun’s embrace can be fierce!
| 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 | 8 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 10 | very high | 15 min |
| 16:00 | 8 | very high | 15 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 2 | low | 45 min |
Throughout the year, the UV Index exhibits significant seasonal variations that affect sun exposure risks. High-risk months typically occur from April to September, where UV levels rise sharply, peaking in June with an extreme UV Index of 11. During these months, the recommended burn time decreases, reaching as little as 10 minutes in June. As a result, it is crucial for visitors and residents to take precautions during this period, such as wearing protective clothing, applying sunscreen with a high SPF, and seeking shade, especially during midday hours. Conversely, the winter months of January, February, and December present a much lower risk, with moderate UV exposure levels and longer burn times of 30 minutes. Being mindful of these seasonal changes in UV levels can help ensure safer outdoor experiences year-round.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Braga UVI | 2 | 4 | 6 | 8 | 9 | 11 | 10 | 9 | 8 | 6 | 4 | 2 |
| Porto UVI | 2 | 4 | 6 | 8 | 9 | 11 | 10 | 9 | 8 | 6 | 4 | 2 |
| Amadora UVI | 3 | 5 | 6 | 9 | 10 | 11 | 10 | 9 | 8 | 6 | 4 | 3 |
| Lisbon UVI | 3 | 5 | 6 | 9 | 10 | 11 | 10 | 9 | 8 | 6 | 4 | 3 |
| Setubal UVI | 3 | 5 | 6 | 9 | 10 | 11 | 10 | 9 | 8 | 6 | 4 | 3 |
| Rosais | 3 | 5 | 7 | 8 | 10 | 11 | 10 | 10 | 9 | 7 | 4 | 3 |