Last updated: July 2, 2025
Being aware of the UV Index is crucial for residents and visitors of Santa Maria Huiramangaro (San Juan Tumbio), Mexico, where the climate is classified as Cwa, characterized by dry winters and wet summers. Understanding UV levels is essential not only for preventing sunburn but also for protecting long-term skin health. With peak UV exposure reaching a concerning index of 14 around midday, it’s important to stay informed about daily UV fluctuations to avoid harmful effects from the sun. Whether you're enjoying outdoor activities or simply soaking up the sun's rays, make sure to take the necessary precautions to safeguard your skin in this vibrant locale.
The UV Index throughout the day showcases a striking rise and fall in solar intensity. Starting from a modest 0 at 07:00, the index steadily climbs, reaching peak levels at 14:00 with a scorching 14. This midday surge is a vivid reminder of the sun's power, with 11 by noon and its highest intensity hitting 13 during the early afternoon. As the day progresses, the UV Index gracefully declines, sliding back to 6 at 17:00, before tapering off to 1 by 19:00. It's crucial to stay protected during those peak hours, especially from 11:00 to 15:00, when UV exposure can be at its most intense!
| 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 | 6 | high | 25 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, there are significant fluctuations in UV levels, with the highest indices occurring from February to October. This period sees extreme UV conditions, particularly from March to October where the UV Index consistently registers 14 to 15. January and November reflect very high exposure (UV Index 10) with a burn time of 15 minutes, while December sees a slight dip to a UV Index of 9. Visitors and residents are strongly advised to take precautions during the months of February to October, as these are categorized as high-risk months for skin damage, with a burn time of only 10 minutes. Wearing protective clothing, applying broad-spectrum sunscreen, and seeking shade during peak sunlight hours are essential measures to safeguard against harmful UV exposure.
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 |
| Iztapalapa UVI | 10 | 12 | 14 | 15 | 14 | 14 | 14 | 14 | 14 | 12 | 10 | 8 |
| Santa Maria Huiramangaro (San Juan Tumbio) | 10 | 12 | 14 | 15 | 14 | 14 | 14 | 14 | 14 | 12 | 10 | 9 |
| 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 |