Last updated: June 2, 2025
Understanding the UV Index in San Justo, Spain is crucial for safeguarding your skin and overall health. With peak UV levels often reaching a striking 11 during the midday sun, awareness of these fluctuations can play a vital role in preventing sunburn and reducing long-term skin damage. Given San Justo's Csb climate, characterized by warm summers and mild winters, locals and visitors alike must remain vigilant about the UV exposure risks, especially during the summer months when sun intensity is most pronounced. Stay informed, enjoy the outdoors, and protect your skin from harmful rays!
The UV Index throughout the day reveals a dynamic pattern of sun exposure. Starting from a mild 1 at 7:00 AM, the index gradually rises, peaking at an intense 11 between 14:00 and 15:00. This is a critical time for outdoor activities, as exposure to sunlight becomes increasingly intense. Notably, the index jumps from 6 at 11:00 AM to 8 at noon, finally hitting its zenith with a blistering 10 at 1:00 PM. As the sun begins its descent, the UV index graciously falls, settling at 5 by 6:00 PM and tapering off to 3 by 7:00 PM. Be cautious during the peak hours for effective sun safety!
| 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 | 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 | 5 | moderate | 30 min |
| 19:00 | 3 | moderate | 30 min |
Throughout the year, seasonal changes in UV Index highlight significant variations in sun exposure risk. January and December see a low UV Index of 2, allowing for safer outdoor activities with a burn time of 45 minutes. However, as spring approaches, February and March indicate a shift to moderate to high exposure, transitioning to very high levels in April and May with indices reaching 8 and 10 respectively. The peak months of June and July present an extreme UV Index of 11, underscoring the necessity for sun protection, as the burn time drops to 10 minutes. August and September maintain a very high category but begin to taper off, while October reduces to high and November returns to moderate levels. It is crucial for both residents and visitors to note that the high-risk months are from April to September, and during these months, taking precautions such as wearing sunscreen, protective clothing, and seeking shade is essential to prevent sunburn and long-term skin damage.
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 |
| San Justo | 2 | 4 | 6 | 8 | 10 | 11 | 10 | 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 |