Last updated: August 1, 2025
In Casas de Haro, Spain, understanding the UV Index is crucial for maintaining skin health and preventing sunburn, especially during the warmer months. With a Mediterranean climate characterized by hot, sunny summers, residents and visitors alike must be aware of the daily UV levels to protect themselves from harmful exposure. On particularly intense days, like when the UV Index reaches a peak of 11 around mid-afternoon, unprotected skin can become vulnerable in just minutes. By staying informed about the UV Index, you can enjoy the beautiful sunshine while safeguarding your skin’s health.
As the sun rises, the UV Index starts low, peaking at 1 by 07:00 and remaining steady at 1 through 08:00. However, by 09:00, it begins to climb, reaching 2. The real heat kicks in around 10:00, where the index jumps to 4, and by 11:00, it surges to 6. The peak intensity is recorded between 12:00 and 14:00, soaring to 8 and hitting a blistering 11—the highest level for the day. As the afternoon progresses, the values begin to wane, dropping back to 9 by 16:00, then to 6 by 17:00, and finally tapering off to 4 at 18:00, before settling at 2 by 19:00. It's a reminder to stay protected 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 | 3 | moderate | 30 min |
| 19:00 | 2 | low | 45 min |
Throughout the year, the UV Index demonstrates significant seasonal changes, with the highest risk occurring in the summer months of June and July, where the index reaches an extreme level of 12 and 11 respectively, necessitating only 10 minutes of exposure before risk of burns increases. Notably, April through September marks a period of very high to extreme UV levels, with May peaking at a UV Index of 10. Visitors and residents should exercise caution, particularly from March onwards, as the risk escalates rapidly; sunscreen application, protective clothing, and avoidance of direct sunlight during midday hours are strongly advised. Conversely, the winter months of December through February present a lower risk, with moderate UV levels, allowing for more extended outdoor activities with proper protection.
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 |
| 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 |
| Casas de Haro | 3 | 5 | 6 | 9 | 10 | 12 | 11 | 10 | 9 | 7 | 4 | 3 |