Last updated: May 3, 2025
Understanding the UV Index in Arenas de San Juan, Spain, is essential for anyone who values their skin health and wishes to enjoy the abundant sunshine safely. With peak UV levels soaring to 10 during the hottest parts of the day, awareness of these radiation levels is crucial for preventing sunburn and long-term skin damage. Nestled in a BSk climate zone, Arenas de San Juan boasts hot summers with significant UV exposure risks, especially from late morning to mid-afternoon. Equip yourself with the knowledge of the UV Index to protect your skin while soaking up the sun's rays!
As the day progresses, the UV Index rises steadily, starting at a low of 1 at 7:00 AM and 8:00 AM. By 9:00 AM, it nudges up to 2, but the real surge begins around 10:00 AM when it reaches 3. The peak UV intensity occurs between 12:00 PM and 2:00 PM, with a striking 10 at both 1:00 PM and 2:00 PM, indicating a high potential for skin damage without protection. Fortunately, the index starts to decline slightly after 3:00 PM, dropping to 8 at 4:00 PM and gradually decreasing to 2 by 7:00 PM. It's crucial to stay sun-smart during the midday hours when the UV rays are at their strongest!
| 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 | 3 | moderate | 30 min |
| 11:00 | 6 | high | 25 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 10 | very high | 15 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. The high-risk months are typically from March to October, with April and May peaking at a very high index of 9 and 10, and reaching an extreme level of 12 in June and July. During these months, the risk of skin damage from sun exposure increases significantly, with recommended burn times decreasing to as little as 10 minutes. Visitors and residents are advised to take precautions by wearing protective clothing, applying sunscreen regularly, and seeking shade during peak sunlight hours, especially in the summer months. As the UV levels decline from October to February, while still moderate, it remains important to remain vigilant about sun protection during outdoor activities.
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 |
| Arenas de San Juan | 3 | 4 | 6 | 9 | 10 | 12 | 11 | 10 | 9 | 7 | 4 | 3 |
| Sevilla UVI | 3 | 5 | 7 | 9 | 10 | 11 | 10 | 10 | 9 | 7 | 4 | 3 |