Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors of Aldeia de Joanes, Portugal, where the climate offers beautifully warm summers but also brings potential health risks associated with sun exposure. With UV levels reaching a peak of 10 from 1 PM to 2 PM, awareness of these indicators plays a vital role in preventing sunburn and protecting skin health. Given the region's Csb climate, which features a mix of Mediterranean and oceanic influences, it is essential to stay informed about daily UV fluctuations to enjoy the outdoors safely while minimizing the risk of harmful effects from intense sunlight.
The UV Index is a dynamic measure of solar intensity throughout the day, peaking dramatically at 12:00 PM with a notable 9, reaching its zenith at 1:00 PM and 2:00 PM with a maximum value of 10. During this period, it's essential to protect your skin from harmful UV rays. Early morning hours remain quite low, peaking at just 1 by 08:00 AM, while by 10:00 AM the index climbs to 5. As the sun continues to rise, it climbs swiftly to 7 by 11:00 AM, making midday the crucial time for sunscreen and shade. As the afternoon wanes, the UV Index gradually decreases, falling back to 5 by 5:00 PM, and finally settling at 1 by 7:00 PM, signaling a safe return to outdoor activities. Stay vigilant and enjoy the sunshine safely!
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 | 9 | very high | 15 min |
13:00 | 10 | very high | 15 min |
14:00 | 10 | very high | 15 min |
15:00 | 9 | very high | 15 min |
16:00 | 7 | high | 25 min |
17:00 | 5 | moderate | 30 min |
18:00 | 3 | moderate | 30 min |
19:00 | 1 | low | 45 min |
Throughout the year, the UV Index experiences significant fluctuations, highlighting the importance of sun safety for both visitors and residents. High-risk months for skin exposure occur from April to September, with May and June reaching the highest levels at a UV Index of 10 and 11, categorized as very high and extreme, respectively, where burn times can be as short as 10 minutes. As the warmer months approach, individuals should take necessary precautions, such as wearing protective clothing, using sunscreen, and seeking shade during peak hours. As winter arrives in December and January, the UV Index decreases to 3 and 4, indicating a moderate risk, but protection remains essential to prevent skin damage. By being mindful of these seasonal UV changes, everyone can enjoy outdoor activities safely 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 |
Aldeia de Joanes | 3 | 4 | 6 | 9 | 10 | 11 | 10 | 9 | 8 | 6 | 4 | 3 |
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 |