Last updated: August 1, 2025
Understanding the UV Index is crucial for residents and visitors of Castrillo de Don Juan, Spain, as it serves as a vital tool in protecting your skin from harmful ultraviolet rays. With peak UV levels reaching 11 during the midday hours, awareness of these fluctuations can help prevent sunburn and promote overall skin health. Nestled in a Csb climate zone, Castrillo de Don Juan experiences a mix of maritime and Mediterranean influences, which can lead to varying UV exposure risks throughout the year. By staying informed about the UV Index, you can enjoy the sun safely while safeguarding your skin from its potential damage.
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 Don Juan | 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 |