Last updated: June 2, 2025
Understanding the UV Index is crucial for residents of Mariano Melgar, Peru, as it provides vital information about the sun's intensity and potential risks to skin health. With a climate characterized by dry conditions and high solar exposure in the BWk zone, knowing the UV levels can help prevent sunburn and long-term skin damage. During the midday hours, particularly between 10:00 AM and 1:00 PM, the UV Index reaches its peak at 10, indicating a very high risk of harm from unprotected sun exposure. Staying informed and taking protective measures is essential for enjoying the beautiful outdoors safely!
The UV Index displayed an intriguing daylight journey, peaking at 10 around 11:00 AM and 12:00 PM, signaling a high risk for sun exposure. Starting from a mild 1 at 7:00 AM, the intensity gradually escalated, reaching a moderate 5 by 9:00 AM. As the sun ascended, it propelled the index to a robust 8 by 10:00 AM. The decline began post-noon, with the index slipping to 6 at 2:00 PM, and eventually tapering off to a mere 1 by 4:00 PM. The day wrapped up with 0 UV readings after 6:00 PM, emphasizing the importance of sun protection during peak hours when UV radiation poses the greatest risk.
| 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 | 8 | very high | 15 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 8 | 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 fluctuates significantly throughout the year, with the highest risk of exposure occurring in the winter months of January and November, both registering a critical UV Index of 18, which corresponds to an extreme exposure category and a minimal burn time of just 10 minutes. Similarly, the months of February, March, April, September, October, and December all maintain an extreme level with indices ranging from 17 to 15, emphasizing the need for consistent sun protection. The late spring to mid-summer months, particularly May to July, see a slight decrease to a very high index of 12 in May and stabilizing at 10-11 during June and July. Visitors and residents are strongly advised to take precautions year-round, especially from January to April and September to November, ensuring adequate sunscreen application, protective clothing, and limiting sun exposure during peak hours to mitigate the risks of UV-related health issues.
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 |
| Mariano Melgar | 18 | 17 | 17 | 15 | 12 | 10 | 11 | 13 | 15 | 17 | 18 | 17 |
| Arequipa UVI | 18 | 17 | 17 | 15 | 12 | 10 | 11 | 13 | 15 | 17 | 18 | 17 |