Last updated: June 2, 2025
In Ribeira Grande, Portugal, being aware of the UV Index is crucial for protecting your skin from harmful sun exposure. Understanding UV levels not only helps prevent painful sunburns but also plays a significant role in maintaining long-term skin health. With the city's Cfb climate, residents and visitors alike encounter periods of high UV exposure, particularly during the peak midday hours when the index can soar to 11. Staying informed about daily UV levels can empower you to take effective precautions, ensuring that your time in the sun is both enjoyable and safe.
Experience the daily rise and fall of the UV Index with remarkable clarity! As the sun climbs higher in the sky, the UV Index starts at a mild 1 at 07:00 and 08:00, making it a safe time for morning activities. However, watch as it surges to 4 by 10:00, reaching its peak at a striking 11 between 13:00 and 14:00—a reminder to embrace sun protection. The afternoon sun commands respect as it gradually dips to 10 at 15:00, before easing into the evening with readings of 8 at 16:00, 6 at 17:00, and finally settling to a gentle 2 by 19:00. Stay safe and enjoy your time under the sun!
| 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 | 7 | high | 25 min |
| 12:00 | 9 | 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 | 6 | high | 25 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 2 | low | 45 min |
As the seasons change, so do the UV index levels, with highest risks typically occurring from April to September. During these months, especially in June when the UV index reaches an extreme level of 11, the burn time is as short as 10 minutes. Visitors and residents should be particularly vigilant during this period, taking necessary precautions such as applying sunscreen with a high SPF, wearing protective clothing, and limiting sun exposure during peak hours. Conversely, during the winter months from January to March, the UV levels are substantially lower, categorized as moderate to high, allowing for safer outdoor activities with burn times ranging from 25 to 30 minutes. It’s crucial to remain aware of these seasonal changes to protect skin health throughout the year.
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 |
| Ribeira Grande | 3 | 5 | 7 | 9 | 10 | 11 | 10 | 10 | 9 | 7 | 4 | 3 |