Last updated: May 3, 2025
In San Juan de Razos, Mexico, awareness of the UV Index is crucial for maintaining skin health and preventing sunburn, especially in this Cwa climate, which is characterized by warm summers and moderate rainfall. Understanding UV levels is essential, as they can reach dangerously high levels every afternoon, peaking at 14 around midday. With consistent exposure, the risk of skin damage increases significantly. By staying informed about the UV Index, residents and visitors can take proactive measures to protect themselves, ensuring a safer and more enjoyable time outdoors in this vibrant locale.
The UV Index throughout the day showcased a striking pattern, beginning with a negligible level of 0 at 07:00. As the sun rose, the intensity gradually increased, reaching a modest 1 at 08:00 and climbing to 2 by 09:00. The real surge occurred as the day unfolded, peaking at an intense 14 from 13:00 to 14:00, indicating a high risk of harm from unprotected sun exposure. From this zenith, the index started to decline, dropping to 9 by 16:00 and tapering off to 1 by 19:00. This dynamic progression underscores the importance of sun safety during peak hours, particularly between noon and early afternoon.
| 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 | 5 | moderate | 30 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 14 | extreme | 10 min |
| 14:00 | 14 | 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 |
The seasonal UV changes indicate a significant increase in UV Index values from January to October, peaking at 14 during the months of March through June, categorized as extreme exposure with a burn time of only 10 minutes. Following this peak, UV levels gradually decrease but remain high in the late summer and early fall months, notably staying in the 13 range from July to September, before dropping to 12 in October. November and December see a return to very high levels, with indices of 9 and 8 respectively, allowing for slightly longer burn times of 15 minutes. As a result, it is crucial for both visitors and residents to take precautions during the high-risk months of February through October by wearing appropriate sun protection, seeking shade, and limiting sun exposure, especially during peak hours, to minimize the risk of skin damage.
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 Juan de Razos | 9 | 11 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 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 |