Last updated: June 2, 2025
In Atotonilco el Grande, Mexico, being aware of the UV Index is crucial for protecting your skin and overall health. With high UV levels peaking around midday, understanding this vital indicator helps prevent sunburn and long-term skin damage. The region's Cwb climate typically features warm days with intense sun exposure, making it essential to monitor UV levels regularly. Whether you're enjoying outdoor activities or simply soaking up the sun, staying informed can help you take appropriate precautions and ensure a safe and enjoyable experience under the Mexican sun.
The UV Index throughout the day showcases a dynamic rise and fall in sun intensity. Starting off gently, at 7:00 AM, the index registers a low maximum of 1, gradually climbing to 3 by 9:00 AM. The sun's power peaks dramatically at 12:00 PM, reaching a sweltering high of 12, and continues to soar to an intense 14 from 1:00 PM to 2:00 PM. As the afternoon wears on, the index begins to descend, dropping to 9 by 4:00 PM and tapering off to a milder 5 by 5:00 PM. The evening brings a return to cooler levels, with values falling back to 1 by 7:00 PM. It’s a day where protection from the sun is crucial during the midday hours, especially when UV levels are at their peak!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 6 | high | 25 min |
| 11:00 | 9 | 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 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
The UV Index exhibits significant seasonal variation, with the highest levels recorded from February to October, peaking at 15 in May. This period is classified as having an extreme exposure category, where even short sun exposure can lead to skin damage in just 10 minutes. High-risk months include February through October, with particularly intense UV radiation from March to September. Residents and visitors should take precautionary measures, such as wearing protective clothing, applying broad-spectrum sunscreen, and seeking shade during peak hours. In the higher-risk months, it is essential to remain vigilant about sun safety to minimize the risk of harmful UV exposure. As the year progresses into November and December, the UV Index decreases, but caution is still advised, especially during the bright sunny days.
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 |
| Atotonilco el Grande | 9 | 11 | 14 | 14 | 15 | 14 | 14 | 14 | 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 |