Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors of San Lorenzo, Peru, where the high-altitude climate can significantly elevate your exposure to harmful ultraviolet rays. As the sun ascends in the sky, UV levels can reach peaks of 12 around noon, indicating a severe risk for skin damage. This makes awareness of UV levels essential for preventing sunburn and protecting overall skin health. With its pleasant yet intense sun exposure, being informed can help you enjoy the outdoors safely while minimizing the risks associated with prolonged sun exposure in this vibrant coastal region.
The UV index throughout the day paints a striking picture of sun exposure. Starting from a mild level of 1 at 07:00, the intensity climbs steadily, reaching a noteworthy 3 by 08:00. However, it truly peaks at 10:00, hitting an impressive 12, which indicates a very high risk of harm from unprotected sun exposure. As the sun reaches its zenith between 11:00 and 12:00, the index remains at its maximum of 12 before beginning to taper off. By 13:00, it drops to 10, then further declines to 6 by 14:00. The afternoon gives way to a significant decrease, with levels falling back to 3 at 15:00 and returning to a comfortable 1 by 16:00. As the day winds down, the index dwindles to 0 by 18:00, marking a safe transition into evening. It’s essential to stay sun-smart during the peak hours, especially from 10:00 to 14:00, to enjoy the sunshine while protecting your skin!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 7 | high | 25 min |
| 10:00 | 10 | very high | 15 min |
| 11:00 | 12 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 6 | high | 25 min |
| 15:00 | 3 | moderate | 30 min |
| 16:00 | 1 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV Index in this region exhibits significant fluctuations throughout the year, with extreme levels persisting from January to April and then again in August and November. May marks a slight decrease, transitioning to a very high UV Index in June and July, where the burn time extends to 15 minutes. Visitors and residents should be particularly cautious from January through April and again in August and November, as these months pose the highest risk for UV exposure. It is advisable to apply sunscreen, wear protective clothing, and limit sun exposure during these times, especially during peak hours, to prevent skin damage.
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 |
| San Lorenzo | 15 | 16 | 15 | 14 | 12 | 10 | 10 | 11 | 13 | 15 | 16 | 15 |
| Chiclayo UVI | 14 | 15 | 15 | 14 | 13 | 11 | 11 | 12 | 15 | 14 | 14 | 13 |
| Arequipa UVI | 18 | 17 | 17 | 15 | 12 | 10 | 11 | 13 | 15 | 17 | 18 | 17 |