Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Sant Julia de Cerdanyola, Spain, where the sun's intensity can vary dramatically throughout the day, particularly in the warmer months. Monitoring UV levels is vital for sunburn prevention and maintaining overall skin health, as excessive exposure can lead to serious long-term effects. Nestled in a Cfb climate zone, Sant Julia typically experiences moderate temperatures, but during peak hours, the UV Index can reach alarming levels—peaking at 11 from 1 PM to 2 PM. By being UV-aware and taking the necessary precautions, you can enjoy the beautiful outdoors safely while protecting your skin.
The UV Index fluctuates throughout the day, showcasing a peak at 1 PM with a notable 11, indicating the highest risk of harm from unprotected sun exposure. Early morning hours see a mild index of 1 to 3 until 9 AM, making it relatively safe for outdoor activities. As the sun climbs, the index surges to 5 by 10 AM, before reaching intense levels of 7 at 11 AM. The midday sun intensifies, with values hitting 9 at 12 PM and maintaining 11 until 2 PM. Following this peak, a gradual decline occurs with the UV Index dropping to 8 at 4 PM, 6 at 5 PM, and finally tapering off to 2 by 7 PM. For safe sun enjoyment, remember to protect your skin during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 10 | 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 Index levels fluctuate significantly, creating varying exposure risks for individuals. The high-risk months for UV exposure are April through August, with the highest readings occurring in June and July, where the UV Index reaches a peak of 11, classified as extreme. During these months, the recommended burn time drops to just 10 minutes. As such, it is crucial for both visitors and residents to adopt protective measures, including wearing sunscreen, protective clothing, and limiting sun exposure during peak hours. March marks the transition to higher UV levels, with an index of 6, while September and October drop back to high and moderate levels, respectively. Ultimately, staying informed about UV levels can help safeguard health year-round.
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 |
| Sant Julia de Cerdanyola | 3 | 4 | 6 | 8 | 9 | 11 | 11 | 9 | 8 | 6 | 3 | 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 |