Last updated: July 2, 2025
In San Genaro, Peru, awareness of the UV Index is crucial for maintaining optimal skin health and preventing sunburn. Understanding UV levels helps residents and visitors alike protect themselves from harmful sun exposure, particularly during peak hours. Situated in a tropical highland climate (ET), San Genaro experiences significant UV radiation with indices soaring to a maximum of 14 around midday. With the sun’s intensity peaking between 10 AM and 2 PM, it's essential to stay informed and take appropriate precautions to enjoy the beautiful outdoors safely.
As the sun rises, the UV Index gradually climbs, starting at a mild 1 at 7:00 AM. By 9:00 AM, it reaches a moderate 5, but the real intensity kicks in at 10:00 AM with a peak of 9. The index soars to its highest point of 14 at 12:00 PM, signaling a need for sun protection. It remains high at 13 until 1:00 PM, then begins a slow descent, dropping to 10 by 2:00 PM and gradually decreasing to 6 by 3:00 PM. As the afternoon fades, the UV Index plummets to 2 at 4:00 PM and finally settles at 0 for the evening, emphasizing the importance of midday vigilance for sun safety.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 12 | extreme | 10 min |
| 12:00 | 14 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 6 | high | 25 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, the UV Index remains consistently high, with extreme levels recorded from January to December. The highest UV values occur in the early months, with January and February peaking at an index of 22, indicating a critical risk of harm from unprotected sun exposure, where a burn can occur in just 10 minutes. Visitors and residents should be particularly mindful during these months, as well as in March and April, when the index remains above 18. Although the index slightly decreases during the summer months, it remains above 13, necessitating continued sun protection. As such, it is advised to use sunscreen, wear protective clothing, and seek shade during peak hours throughout the year to minimize the risk of 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 |
| 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 |
| San Genaro | 22 | 22 | 20 | 18 | 15 | 13 | 14 | 15 | 17 | 19 | 20 | 21 |