Last updated: May 3, 2025
In San Bartolome Aguas Calientes, Mexico, being aware of the UV Index is crucial for protecting your skin and overall health. Understanding the UV levels can help you prevent sunburns and reduce the risk of long-term skin damage, especially during the peak hours when UV radiation reaches its highest levels—from 11:00 AM to 2:00 PM, with an alarming peak of 15! Given the climate of this region, characterized by its mild temperatures and intense sun exposure, staying informed about the UV Index can empower residents and visitors alike to enjoy the outdoors safely. Don’t underestimate the sun’s power; make informed choices to safeguard your skin throughout the day!
The UV Index follows a striking pattern throughout the day, beginning gently in the morning. At 7:00 AM, the index is at a low 1, gradually rising to 2 by 9:00 AM. The real surge happens as the sun climbs higher; by 10:00 AM, the index shoots up to 5, and by 11:00 AM, it reaches a robust 9. The peak intensity occurs between 12:00 PM and 2:00 PM, with a scorching 15 at both 13:00 PM and 14:00 PM. As the afternoon wanes, the index begins its descent—down to 9 at 4:00 PM, then gradually falling to 1 by 7:00 PM. This data highlights the importance of sun protection during peak hours, especially from 12:00 PM to 2:00 PM, when UV exposure is at its highest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 15 | extreme | 10 min |
| 14:00 | 15 | extreme | 10 min |
| 15:00 | 13 | extreme | 10 min |
| 16:00 | 9 | very high | 15 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
The UV Index experiences significant fluctuations throughout the year, with the highest values occurring between February and September. During these months, particularly from March to May, the index reaches extreme levels, peaking at 15 in May. January, November, and December show relatively high UV readings, with a "very high" exposure category, but the risk of sunburn is notably lower, allowing for 15 minutes of safe exposure. Visitors and residents are strongly advised to take precautions during high-risk months by seeking shade, wearing protective clothing, and applying sunscreen every two hours to minimize the risk of skin damage. Stay vigilant, as even short exposure times can be harmful during peak UV periods.
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 |
| San Bartolome Aguas Calientes | 9 | 11 | 14 | 14 | 15 | 14 | 13 | 13 | 14 | 12 | 10 | 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 |