Last updated: July 2, 2025
In Castellar de la Frontera, Spain, a charming village nestled in the Csa climate zone, being aware of the UV Index is crucial for maintaining skin health and preventing sunburn. The UV levels can soar to a peak of 10 during the midday hours, highlighting the need for vigilance in sun protection. Understanding these levels empowers residents and visitors alike to take proactive measures against harmful UV radiation, ensuring enjoyable outdoor activities while safeguarding their skin. With its warm climate, Castellar's sunny days offer plenty of opportunities for exploration, but it's essential to stay informed about the UV Index to enjoy the sun safely.
The UV Index throughout the day begins gently, with morning readings of 0 at 07:00 and barely rising to 1 by 09:00. As the sun climbs higher, the intensity increases, peaking at 10 between 14:00 and 15:00, indicating a high risk of harm from unprotected sun exposure. By 12:00, the index reaches 7, warning those outdoors to take precautions. The afternoon begins a gradual decline, with readings falling to 2 by 19:00. If you plan to be outside, remember to stay hydrated and apply sunscreen 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 | 10 | very high | 15 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 |
As the seasons change, so do the UV index levels, with highest risks typically occurring from April to September. During these months, especially in June when the UV index reaches an extreme level of 11, the burn time is as short as 10 minutes. Visitors and residents should be particularly vigilant during this period, taking necessary precautions such as applying sunscreen with a high SPF, wearing protective clothing, and limiting sun exposure during peak hours. Conversely, during the winter months from January to March, the UV levels are substantially lower, categorized as moderate to high, allowing for safer outdoor activities with burn times ranging from 25 to 30 minutes. It’s crucial to remain aware of these seasonal changes to protect skin health throughout the year.
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 |
| Castellar de la Frontera | 3 | 5 | 7 | 9 | 10 | 11 | 10 | 10 | 9 | 7 | 4 | 3 |