Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors of Castejon, Spain, where the warm Cfa climate presents unique sun exposure risks. As UV levels can soar, particularly between noon and mid-afternoon when they peak at 11, being aware of these fluctuations can significantly impact your skin health and help prevent sunburn. By actively monitoring the UV Index, you can make informed decisions about sun protection, whether it's choosing to seek shade, wearing sunscreen, or adorning protective clothing. Stay informed and enjoy the sunny days safely in our beautiful town!
As the sun rises, the UV Index starts off mild, peaking at 1 by 8:00 AM. However, things heat up quickly! By 10:00 AM, it surges to 4, reaching 6 at 11:00 AM. The afternoon sun really cranks it up, hitting a maximum of 11 at 2:00 PM, making this the moment when protective measures should be a priority. As we approach late afternoon, the index begins to drop, settling at 6 by 5:00 PM and tapering off to 2 by 7:00 PM. Remember to stay sun-safe during those peak hours!
| 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 | 9 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 10 | 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 fluctuates significantly, indicating varying levels of sun exposure risk for visitors and residents. The months of April through September are particularly critical, with April peaking at a UV Index of 8 (very high) and June reaching an extreme level of 11. The high-risk months—May, June, and July—demand heightened sun protection, as the burn time during these periods is reduced to just 10-15 minutes. In contrast, the winter months of December and January feature lower UV levels, with January's Index at 3 and a burn time of 30 minutes. To stay safe, residents and visitors should wear sunscreen, protective clothing, and avoid direct sunlight during peak hours, especially from April to September.
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 |
| Castejon | 3 | 4 | 5 | 8 | 9 | 11 | 10 | 9 | 8 | 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 |