Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Sant Joan Despí, Spain, where sun exposure can significantly impact skin health. With a Mediterranean climate that brings hot summers and intense sunlight, being aware of UV levels helps in preventing sunburn and reducing long-term skin damage. During peak hours, especially from 12 PM to 2 PM, UV Index levels can reach a high of 10, indicating a very high risk of harm from unprotected sun exposure. Staying informed about these levels not only protects your skin but also enhances your overall health while enjoying the beautiful Sant Joan Despí outdoors.
The UV Index reveals a dynamic pattern throughout the day, beginning with a minimal UVI of 1 at 07:00, and gradually rising as the sun ascends. By 10:00, it reaches 4, signaling a shift towards higher exposure, and by 12:00, it peaks at an impressive 8. Among the highest readings, 13:00 and 14:00 hit a scorching 10, emphasizing the need for sun protection during these hours. As the afternoon wanes, the index starts to decline, dropping to 7 by 16:00, and further declining to 5 at 17:00. As evening approaches, the UVI diminishes to 3 at 18:00, and concludes with a gentle 2 at 19:00. This pattern underscores the importance of vigilance against UV exposure as midday approaches, encouraging outdoor enthusiasts to take precautions when the sun is at its strongest.
| 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 | 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 | 2 | low | 45 min |
During the year, UV levels fluctuate significantly, with high-risk months typically occurring between April and August, when the UV Index reaches its peak at 9 to 10, corresponding to a very high exposure category and a burn time of just 15 minutes. May, June, and July are particularly critical, urging both visitors and residents to take extra precautions during outdoor activities. In contrast, January through March and November to December present moderate to low UV Index levels, giving individuals longer burn times before requiring sun protection. To minimize skin damage, it's advisable to wear sunblock, protective clothing, and hats during high UV Index periods, especially in the summer months.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Barcelona UVI | 3 | 4 | 5 | 7 | 8 | 10 | 10 | 9 | 7 | 6 | 3 | 2 |
| Sant Joan Despi | 3 | 4 | 5 | 7 | 9 | 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 |