Last updated: June 2, 2025
Understanding the UV Index in Almagreira, Portugal, is essential for safeguarding your skin against harmful ultraviolet rays. With its Mediterranean climate characterized by hot summers and moderate UV exposure, being aware of UV levels can help you prevent sunburn and promote long-term skin health. The UV Index varies throughout the day, peaking between 12:00 PM and 2:00 PM with values reaching as high as 11, indicating a very high risk of harm from unprotected sun exposure. By staying informed, you can enjoy the sunny beauty of Almagreira while keeping your skin safe and healthy.
From 07:00 to 08:00, the UV Index remains low at 1, making it a safe time for morning activities. As the sun rises higher, the index climbs to 3 by 09:00, reminding you to take some precautions. The intensity peaks around 12:00, hitting a scorching 10, while the following hour sees an even higher 11 at 13:00 and 14:00. This trio of hours is when sunscreen and protective clothing are essential. As the afternoon progresses, the UV Index begins to decline, dropping to 8 at 16:00 and trailing off to 5 by 17:00. As evening approaches, you can enjoy the outdoors again, with levels returning to 3 by 18:00 and settling back to 1 by 19:00. Stay protected during the peak hours, and enjoy the rest of your day!
| 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 | 7 | high | 25 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 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 | 1 | low | 45 min |
Seasonal changes in the UV Index illustrate a notable increase in sun exposure risk from late winter through summer. January and December feature a moderate UV Index of 3, allowing for 30 minutes of potential sun exposure without burning, while February slightly rises to 5. The risk escalates significantly from March (UV Index 7) to April (UV Index 9) as the burn time decreases to 25 and 15 minutes, respectively. The peak occurs in June with an extreme index of 11, significantly lowering the burn time to just 10 minutes, marking it as a month of high concern. July, August, and September maintain a very high index of 10 and 9, suggesting that residents and visitors should take extra precautions, including wearing sunscreen and protective clothing, during these months. As temperatures cool down in October (7) and November (5), the risk subsides to high and moderate levels again, offering a slight respite. Overall, it is crucial for everyone to remain vigilant about UV exposure, especially during the high-risk months of April to September.
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 |
| Almagreira | 3 | 5 | 7 | 9 | 10 | 11 | 10 | 10 | 9 | 7 | 5 | 3 |