Last updated: June 2, 2025
Understanding the UV Index in Santa Catalina de Siena, Mexico, is crucial for protecting your skin and overall health. With intense sun exposure typical of the BSk climate, being aware of UV levels can help you prevent sunburn and long-term skin damage. The UV index peaks around midday, soaring to a concerning 14, making it essential to take protective measures during these hours. By tracking the UV Index, residents and visitors can enjoy the beautiful Mexican sun safely while prioritizing their skin’s health.
As the sun rises, the UV Index begins to peak at 08:00 with a mild level of 1, slowly climbing through the morning. By 10:00, it has reached 4, signaling the start of a more intense exposure. The 11:00 mark brings a notable jump to 8, but it isn't until 12:00 that the UV Index hits a striking 11—a reminder to protect your skin! The maximum intensity occurs at 14:00, with the Index soaring to 14, making this the most dangerous time for sun exposure. Fortunately, as the afternoon progresses, values start to decline, dropping to 10 by 16:00 and easing further to 4 by 18:00. As evening approaches, the UV Index returns to a modest level of 2 by 19:00, signaling a safer time to enjoy outdoor activities. Stay safe and consider the UV Index throughout the day!
| 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 | 14 | extreme | 10 min |
| 15:00 | 13 | extreme | 10 min |
| 16:00 | 10 | very high | 15 min |
| 17:00 | 7 | high | 25 min |
| 18:00 | 4 | moderate | 30 min |
| 19:00 | 2 | low | 45 min |
Throughout the year, UV Index levels show significant seasonal changes, with the highest values occurring from February to October. The months of February through October see consistently extreme UV exposure categories, peaking at 15 in April, indicating a dangerous sun risk with a minimal burn time of just 10 minutes. January and November are classified as very high, with slightly longer burn times of 15 minutes. December has a high index of 7, allowing for 25 minutes of exposure before burning. Visitors and residents should take extra precautions during the high-risk months of February through October by applying sunscreen, wearing protective clothing, and limiting direct sun exposure, especially during midday hours.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Santa Catalina de Siena | 8 | 11 | 13 | 15 | 14 | 14 | 14 | 13 | 13 | 12 | 9 | 7 |
| Guadalajara UVI | 9 | 11 | 14 | 14 | 14 | 13 | 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 |