Last updated: May 3, 2025
In San Isidro (La Loma), Mexico, being aware of the UV Index is crucial for protecting your skin and overall health. Understanding UV levels not only helps in preventing painful sunburns but also plays a significant role in long-term skin health. With a BSh climate, residents and visitors alike face unique challenges, especially during peak sun hours when UV levels can soar to a staggering 15. This makes it essential to stay informed about daily UV fluctuations, ensuring safe outdoor activities while enjoying the region's sunny allure.
As the sun rises, the UV Index starts at a mild 1 at 7:00 AM, urging early risers to enjoy the gentle rays. By 9:00 AM, it climbs to 2, inviting a leisurely morning outside. However, by 10:00 AM, the intensity spikes to 5, signaling a need for sun protection. The afternoon takes center stage, with the index peaking at a blistering 15 between 1:00 PM and 2:00 PM—the time for serious sun safety measures! As we move into the late afternoon, the UVI gradually declines; it drops to 9 by 4:00 PM and continues to fall to 3 at 6:00 PM. As dusk approaches, the index settles back to 1, offering a gentle reminder of the sun's powerful presence throughout the day.
| 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 | 12 | 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 shows significant seasonal fluctuations, with the highest levels occurring from March to October, representing the peak exposure periods. February through September are particularly high-risk months, characterized by an extreme exposure category and a dangerously low burn time of just 10 minutes. Visitors and residents should take extra precautions during these months, prioritizing sun protection strategies like wearing broad-spectrum sunscreen, hats, and UV-protective clothing. While January, November, and December still retain very high intensity, they allow for slightly longer burn times of 15 minutes, but caution is still advised. Overall, vigilance against UV exposure is crucial year-round, especially during the peak months.
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 Isidro (La Loma) | 9 | 11 | 14 | 14 | 15 | 14 | 14 | 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 |