Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors of San Lorenzo, Peru, as this coastal town experiences a unique climate that can elevate sun exposure risks. With the UV Index peaking at an intense level of 11 during the midday hours, it's essential to comprehend what these levels mean for your skin health and sunburn prevention. San Lorenzo’s Af climate features warm temperatures year-round, making awareness of UV levels vital for enjoying outdoor activities safely. By staying informed about the UV Index, you can take proactive measures to protect yourself and your loved ones from harmful sun rays.
The UV Index data paints a vivid picture of the sun's intensity throughout the day. Early morning hours see a gentle rise, starting at a low of 1 at 07:00, then climbing gradually to reach 4 by 09:00. However, the sun makes its presence felt as mid-morning unfolds, with the index soaring to a peak of 11, recorded at both 12:00 and 13:00. This intense midday sun demands caution, as UV radiation can be particularly harmful. As the afternoon progresses, the UV Index starts to dip significantly, dropping back down to 5 by 15:00 and then further to a gentle 1 by 17:00, signaling that the sun's influence is waning. By evening, from 18:00 onwards, the UV Index falls to 0, offering a much-needed respite as the day comes to a close.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 5 | moderate | 30 min |
| 16:00 | 2 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, UV Index levels remain consistently high, categorized as extreme, which means that burn times are limited to just 10 minutes regardless of the month. The highest UV Index readings occur from January to April, peaking at 16, indicating that these months represent a significant risk for sunburn. May through August see a slight decrease, yet still maintain UV Index values between 11 and 13, sustaining a high-risk environment. Meanwhile, September to December experiences a marginal drop, with values stabilizing around 14 to 13. Visitors and residents should exercise caution during all months, prioritizing sun protection measures such as applying broad-spectrum sunscreen, wearing protective clothing, and seeking shade to mitigate the risks of prolonged sun exposure.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Callao UVI | 14 | 14 | 14 | 12 | 10 | 9 | 10 | 11 | 12 | 13 | 14 | 13 |
| Lima UVI | 14 | 14 | 14 | 12 | 10 | 9 | 10 | 11 | 12 | 13 | 14 | 13 |
| Trujillo UVI | 15 | 15 | 15 | 14 | 12 | 11 | 11 | 11 | 13 | 14 | 14 | 14 |
| Chiclayo UVI | 14 | 15 | 15 | 14 | 13 | 11 | 11 | 12 | 15 | 14 | 14 | 13 |
| San Lorenzo | 15 | 16 | 16 | 16 | 13 | 12 | 11 | 13 | 14 | 14 | 14 | 13 |
| Arequipa UVI | 18 | 17 | 17 | 15 | 12 | 10 | 11 | 13 | 15 | 17 | 18 | 17 |