Last updated: June 2, 2025
In San Isidro, Peru, understanding the UV Index is crucial for safeguarding your skin against the intense sun exposure typical of its arid climate. Knowing the UV levels can help residents and visitors alike prevent sunburn and long-term skin damage. With values skyrocketing to 12 during peak hours, it's essential to stay informed about daily fluctuations in UV intensity. Awareness allows you to take necessary precautions, ensuring your time outdoors remains enjoyable and healthy while minimizing the risks associated with higher UV exposure throughout the day. Whether basking in the sun or enjoying outdoor activities, make UV Index awareness part of your routine in San Isidro!
At dawn, the UV Index starts off gently at 1 by 07:00, but as the morning unfolds, it swiftly climbs. By 09:00, the index hits 6, indicating a moderate risk of harm from unprotected sun exposure. The sun reaches its zenith around noon, peaking at a scorching 12 at 12:00. 11:00 to 12:00 marks the most dangerous hours for sun exposure, with the UV Index staying at 11 and 12, so sunscreen is essential! After this peak, a gradual decline begins. By 14:00, it drops to 7, and then further descends into the afternoon and evening, stabilizing at 0 by 19:00, indicating a safe end to sun exposure for the day. This data serves as a reminder to stay sun-safe during those critical midday hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 7 | high | 25 min |
| 15:00 | 4 | 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 alarmingly high, particularly from January through April, where the index peaks at 17 in March, categorizing the risk of harm from unprotected sun exposure as extreme with a burn time of just 10 minutes. The high-risk months for UV exposure are undeniably the first four months of the year, demanding heightened caution from visitors and residents alike. As the year progresses into May through July, the UV Index gradually decreases but maintains an extreme rating, emphasizing the need for sun protection during outdoor activities. Even in the later months, from August to November, the UV Index remains elevated, never dropping below 12, signaling that vigilance is essential year-round. Residents and visitors should apply sunscreen generously, wear protective clothing, and seek shade during peak sun hours to safeguard their health against harmful UV radiation.
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 Isidro | 15 | 16 | 17 | 16 | 13 | 12 | 11 | 12 | 14 | 14 | 13 | 13 |
| Arequipa UVI | 18 | 17 | 17 | 15 | 12 | 10 | 11 | 13 | 15 | 17 | 18 | 17 |