Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors of Castrillo de la Reina, Spain, particularly as the area experiences a Cfb climate, characterized by mild summers and cool, wet winters. With UV levels peaking at a high of 11 during mid-afternoon hours, awareness can significantly reduce the risk of sunburn and promote long-term skin health. By staying informed about UV levels, you can make safer choices for outdoor activities, ensuring you enjoy the sun responsibly while safeguarding your skin against the harmful effects of excessive UV exposure.
The UV Index shows a dynamic fluctuation throughout the day, starting at a mild 1 early in the morning (07:00 and 08:00) and gradually rising to a moderate 2 by 09:00. However, as the sun climbs higher, the intensity escalates dramatically, peaking at a striking 11 between 13:00 and 15:00—indicative of a high risk for harm from unprotected sun exposure. After reaching its zenith, the index gracefully tapers off, dropping to 9 by 16:00 and ultimately settling at a more manageable 2 by 19:00. It’s a day that demands attention to sun safety, particularly in the 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 | 11 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 11 | extreme | 10 min |
| 16:00 | 9 | very high | 15 min |
| 17:00 | 7 | high | 25 min |
| 18:00 | 4 | moderate | 30 min |
| 19:00 | 2 | low | 45 min |
Throughout the year, UV levels fluctuate significantly, with the most intense exposure occurring from March to August. During these months, particularly in June and July, the UV Index reaches its peak at 11, categorized as extreme, with a critical burn time of just 10 minutes. These months represent high-risk periods for skin damage, necessitating vigilant sun protection. Conversely, January and February experience a moderate UV Index of 3 and 4, allowing for safer outdoor activities, though caution is still warranted. As a general guideline, residents and visitors should stay informed about the UV Index, especially during the high-risk months, and prioritize sun safety by using sunscreen, wearing protective clothing, and seeking shade during peak hours. In contrast, late fall and winter months show a gradual decline in UV levels, culminating in December's low UV Index of 2, allowing for longer exposure without significant risk of sunburn.
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 la Reina | 3 | 4 | 6 | 8 | 10 | 11 | 11 | 9 | 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 |