Last updated: July 2, 2025
In Ejido Viejo, Mexico, understanding the UV Index is crucial for maintaining healthy skin and preventing sunburn. With its tropical climate, residents and visitors are exposed to high UV levels, particularly during midday hours when the index peaks at a staggering 13 from 1 PM to 2 PM. Being aware of UV exposure is vital for safeguarding your skin and minimizing the risk of long-term damage. As the sun's rays intensify, knowing when to seek shade and applying sunscreen can make all the difference in enjoying the beautiful Mexican sun while protecting your skin's health.
The UV Index throughout the day offers a fascinating insight into sun exposure levels. Starting at a low point of 0 at 7:00 AM, it gradually rises, marking 1 by 8:00 AM and reaching a moderate 2 by 9:00 AM. As the sun climbs higher, the intensity peaks dramatically at 12:00 PM with an alarming 11, shortly followed by 13 from 1:00 PM to 2:00 PM, indicating a high risk of harm from unprotected sun exposure. The value then begins a steady decline, dropping to 12 at 3:00 PM, followed by a cooling 9 at 4:00 PM. By 5:00 PM, it retreats to 5, and as daylight wanes, it settles back into the low category with a 2 at 6:00 PM and finally 1 at 7:00 PM. For anyone planning outdoor activities, it’s crucial to take precautions during the peak hours, especially between 11 AM and 2 PM!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 0 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 4 | moderate | 30 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 13 | extreme | 10 min |
| 15:00 | 12 | extreme | 10 min |
| 16:00 | 9 | very high | 15 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, ultraviolet (UV) exposure varies significantly, with high-risk months identified primarily from February to October. During this period, the UV Index consistently falls within the extreme category, peaking at 14 in May, June, and September, indicating a burn time of just 10 minutes. In contrast, January, November, and December see very high UV levels, with longer burn times of 15 minutes. It is crucial for both visitors and residents to practice sun safety during these months by wearing appropriate sunscreen, hats, and protective clothing, and seeking shade during peak sunlight hours. Being aware of these seasonal changes can significantly reduce the risk of skin damage and related health issues.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Guadalajara UVI | 9 | 11 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 9 | 8 |
| Ejido Viejo | 10 | 11 | 13 | 13 | 14 | 14 | 13 | 13 | 14 | 12 | 9 | 8 |
| Iztapalapa UVI | 10 | 12 | 14 | 15 | 14 | 14 | 14 | 14 | 14 | 12 | 10 | 8 |
| Ecatepec de Morelos UVI | 10 | 12 | 14 | 15 | 15 | 14 | 14 | 13 | 14 | 12 | 10 | 8 |
| Mexico City UVI | 10 | 12 | 14 | 15 | 15 | 14 | 14 | 13 | 14 | 12 | 10 | 8 |
| Puebla UVI | 10 | 12 | 14 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 10 | 9 |