Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors in Portosin, Spain, where the beautiful coastal climate can also pose significant sun exposure risks. With peak UV levels reaching as high as 9 during midday, it’s essential to comprehend these fluctuations to protect against sunburn and promote long-term skin health. As a location within the Csb climate zone, Portosin enjoys a temperate maritime climate, but this doesn't negate the importance of sun safety. By keeping an eye on the UV Index, you can enjoy the sun responsibly while safeguarding your skin from harmful rays.
At dawn, the UV Index begins at a cool 0 around 7:00 AM, indicating minimal risk from sun exposure. As the day progresses, it gradually climbs to 1 by 8:00 AM and maintains a steady low of 1 until 10:00 AM. The sun reaches moderate levels by 11:00 AM with a UV Index of 4, peaking at 8 and 9 during the afternoon hours of 13:00 and 14:00. At this point, caution is advised, as the risk of harm from unprotected sun exposure becomes significant. The index starts to decline post-15:00, with values dropping to 6 by 17:00, and continues to fall to a low of 2 by 19:00. For safe sun enjoyment, it's best to seek shade and wear protective gear during the peak hours when the UV Index is expressed at its highest!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 0 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 1 | low | 45 min |
| 10:00 | 2 | low | 45 min |
| 11:00 | 4 | moderate | 30 min |
| 12:00 | 6 | high | 25 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 9 | very high | 15 min |
| 16:00 | 8 | very high | 15 min |
| 17:00 | 6 | high | 25 min |
| 18:00 | 4 | moderate | 30 min |
| 19:00 | 2 | low | 45 min |
Throughout the year, the UV Index in the region shows notable variations, with the most significant increases occurring from April to August. These months, encompassing the peak summer season, experience very high UV levels, reaching up to 10 in June. The high-risk months for sun exposure are primarily April through August, where the burn time drastically decreases to just 15 minutes due to increased UV radiation. Residents and visitors are advised to take extra precautions during this period by wearing protective clothing, applying sunscreen regularly, and seeking shade during peak hours to minimize the risk of skin damage. In contrast, the UV Index is low in January and December, suggesting much safer sun exposure conditions during these winter months.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Portosin | 2 | 4 | 5 | 8 | 9 | 10 | 9 | 9 | 7 | 6 | 3 | 2 |
| Barcelona UVI | 3 | 4 | 5 | 7 | 8 | 10 | 10 | 9 | 7 | 6 | 3 | 2 |
| Zaragoza UVI | 3 | 4 | 6 | 8 | 9 | 11 | 11 | 9 | 8 | 6 | 3 | 2 |
| Valencia UVI | 3 | 4 | 6 | 8 | 9 | 11 | 10 | 9 | 8 | 6 | 4 | 3 |
| Madrid UVI | 3 | 4 | 6 | 8 | 10 | 11 | 11 | 9 | 8 | 6 | 4 | 3 |
| Sevilla UVI | 3 | 5 | 7 | 9 | 10 | 11 | 10 | 10 | 9 | 7 | 4 | 3 |