Last updated: June 2, 2025
In Castellet, Spain, awareness of the UV Index is essential for maintaining skin health and preventing sunburn. With the region's Mediterranean climate, residents and visitors alike face significant exposure to ultraviolet radiation, particularly during the peak hours of 10 AM to 4 PM, when the UV Index can soar to a high of 10. Understanding these UV levels not only helps in planning outdoor activities but also informs protective measures, ensuring that you enjoy Castellet's beautiful sunny days while safeguarding your skin from harmful effects. Stay informed and protect yourself as you embrace the vibrant climate of Castellet!
As the day unfolds, the UV Index rises sharply, peaking at a dramatic 10 between 1:00 PM and 2:00 PM—a clear indication that sun protection is crucial during these hours. Starting from a modest 1 at 7:00 AM, the index climbs steadily, reaching 4 by 10:00 AM. By 11:00 AM, it escalates to 7, and just before noon, it hits 9, urging outdoor enthusiasts to take cover or apply sunscreen. The afternoon sees a slight decline, with values tapering to 5 by 5:00 PM and further down to 2 as the sun sets. This dynamic pattern highlights the importance of being sun-smart, especially during the peak hours of 12:00 PM to 2:00 PM.
| 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 | 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 |
| Castellet | 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 |