Last updated: August 1, 2025
Understanding the UV Index is crucial for the residents and visitors of Castronuevo, Spain, where sunny days can lead to high UV exposure. Knowing the daily UV levels is essential for sunburn prevention and maintaining skin health, especially during peak hours when the risk of harmful UV radiation is at its highest. With a climate classified as Csb, Castronuevo experiences moderate summers, but during the hottest months, UV levels can soar above 8, reaching as high as 10 at midday. By staying informed about the UV Index, you can enjoy the beautiful Spanish sun while protecting your skin from potential damage.
The UV Index rises steadily throughout the morning, starting from a mild 1 at 07:00 and reaching 3 by 10:00. As the sun climbs higher, the intensity peaks dramatically at 10 between 14:00 and 15:00, indicating a high risk of harm from unprotected sun exposure. If you're out and about during this peak time, it's crucial to take precautions—think sunscreen and protective gear! As the afternoon gives way to early evening, the UV Index gradually declines, dropping to 4 by 18:00. By sunset, it's back to a more manageable 3 at 19:00, making later hours more suitable for outdoor activities without the same level of risk. Enjoy the sun wisely!
| 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 | 4 | moderate | 30 min |
| 12:00 | 7 | high | 25 min |
| 13:00 | 8 | 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 | 4 | moderate | 30 min |
| 19:00 | 2 | low | 45 min |
Throughout the year, the UV Index displays notable seasonal changes, indicating varying levels of sun exposure risk. The highest-risk months are April through September, with the UV Index peaking at 11 in June. During these summer months, particularly from May to August, the exposure category is classified as very high to extreme, with burn times decreasing significantly to as little as 10 minutes in June. Residents and visitors should take precautions during these high-risk months by wearing sunscreen, protective clothing, and seeking shade to minimize UV exposure. In contrast, the beginning of the year sees lower UV levels, with January and February classified as moderate, allowing for longer burn times of 30 minutes. As the year winds down, November and December present lower risks, providing safer sun exposure opportunities.
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 |
| Castronuevo | 3 | 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 |