Last updated: August 1, 2025
Awareness of the UV Index is crucial for residents and visitors in Castrillo de Duero, Spain, especially when enjoying its delightful Mediterranean climate. Understanding UV levels can be the key to preventing sunburn and maintaining healthy skin, as prolonged exposure can lead to serious health issues. With UV Index levels soaring up to 11 during the peak hours of the day, it's essential to stay informed about UV exposure risks in this picturesque village. From the early morning through the afternoon, be mindful of the sun's intensity to enjoy the beauty of Castrillo de Duero while prioritizing your skin's safety.
The UV Index data tells a compelling story of sunlight intensity throughout the day. Starting at a gentle 1 at 07:00, the index gradually rises, reaching 3 by 10:00. By 12:00, the scores soar to an impressive 8, peaking at an intense 11 by 14:00. As the afternoon wanes, the UV Index begins to decline, dropping to 7 by 17:00 and further to 2 by 19:00. It's a clear reminder of the day's highest UV exposure between 12:00 and 14:00. Always remember to protect your skin during those peak hours!
| 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 | 3 | moderate | 30 min |
| 11:00 | 5 | moderate | 30 min |
| 12:00 | 7 | high | 25 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 10 | 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 |
As the seasons change, so does the UV Index, significantly impacting sun safety for visitors and residents. From January to February, the UV Index remains at a moderate level (3-4), allowing for 30 minutes of sun exposure without significant risk. However, as we move into March, the index spikes to 7, marking the beginning of high-risk months that peak during the summer. In April and May, the index rises to very high levels (8-10), reducing safe exposure time to just 15 minutes. The extreme levels (11) in June and July necessitate even greater caution, permitting only 10 minutes of safe sun exposure. August and September continue to pose risks with very high levels (8-10) before tapering off in October. By November and December, the UV Index falls back to moderate and low categories (4-2), allowing longer burn times of 30 to 45 minutes. Visitors and residents alike should remain vigilant, especially from March through September, employing sun protection strategies such as sunscreen, hats, and seeking shade during peak hours to minimize health risks.
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 |
| 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 |
| Castrillo de Duero | 3 | 4 | 7 | 8 | 10 | 11 | 11 | 10 | 8 | 6 | 4 | 2 |
| 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 |