Last updated: August 1, 2025
Understanding the UV Index is essential for residents and visitors of El Viso de San Juan, Spain, where sunny skies and a Csa climate promote outdoor activities year-round. Awareness of UV levels is crucial not only for preventing sunburn, but also for protecting your long-term skin health. During peak hours, particularly between 12 PM and 3 PM, the UV Index can soar to an intensity of 11, highlighting significant risks for overexposure. By keeping an eye on these levels, you can enjoy the sun safely and make informed choices about sunscreen, clothing, and shade.
The UV Index today showcases a dramatic rise in intensity as the day unfolds. Early morning hours are quite safe, with a maximum of 1 at 07:00 and 08:00, gradually increasing to 2 by 09:00. The sun reaches its zenith at 12:00, peaking at a striking 8, before hitting a blistering 11 at 14:00. For those planning outdoor activities, caution is advised between 12:00 and 15:00, as the UV levels are at their highest, reaching 10 by 13:00. As the afternoon wanes, the index begins to drop, settling at 6 by 17:00, and tapering off to 2 by 19:00. Embrace the morning sunlight safely, but remember to seek shade 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 | 9 | 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, UV exposure levels vary significantly, with the highest risk months being from April to August. During this period, the UV Index peaks at 11, categorized as extreme in June and July, indicating a burn time of just 10 minutes. As spring transitions into summer, the index climbs from 6 in March to 10 in May, urging caution. From October to March, UV levels decrease, ranging from 3 to 6, classified as moderate to high, allowing for 30 minutes of safe exposure. Residents and visitors are advised to monitor the UV Index closely, especially during the high-risk months, to apply adequate sun protection such as sunscreen, hats, and sunglasses, and to limit direct sun exposure during peak hours.
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 |
| El Viso de San Juan | 3 | 4 | 6 | 9 | 10 | 11 | 11 | 9 | 8 | 6 | 4 | 3 |
| Sevilla UVI | 3 | 5 | 7 | 9 | 10 | 11 | 10 | 10 | 9 | 7 | 4 | 3 |