Last updated: June 2, 2025
Understanding the UV Index is crucial for the residents and visitors of San Cayetano de Vacas, Mexico, where the warm climate can lead to high sun exposure risks. Being aware of UV levels helps in preventing sunburn and maintaining skin health, essential for enjoying outdoor activities safely. In this region's typical BSh climate, UV radiation peaks during midday hours, with indices soaring to 14 from 1 PM to 2 PM. By staying informed about the UV Index, you can take the necessary precautions to protect yourself and your loved ones from the harmful effects of the sun.
Today’s UV Index shows a dramatic rise in intensity as the sun climbs higher in the sky. Starting with a gentle 1 at 7:00 AM, the index gradually increases, reaching a moderate 3 by 9:00 AM. As the clock strikes 11:00 AM, the UV Index peaks at an intense 12, marking a crucial time for sun safety. The highest reading occurs between 1:00 PM and 2:00 PM, where it reaches an exhilarating 14. As the day progresses, the UV levels begin to wane, dropping to 6 by 5:00 PM and eventually settling back to a 1 by 7:00 PM. Make sure to stay protected during the peak hours when the sun is at its strongest!
| 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 | 5 | moderate | 30 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 | 6 | high | 25 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
The seasonal UV changes indicate that the period between March and October presents the highest risks for sun exposure, with UV Index values consistently peaking at 14 during the summer months of May to August. Notably, March sees a significant jump to an extreme rating of 13, marking the start of high-risk months alongside April and September. Visitors and residents are strongly advised to take precautions during these high-risk months, especially from March to October, where the burn time can drop to just 10 minutes. Daily UV awareness is crucial; wearing sunscreen, protective clothing, and seeking shade during peak hours can significantly mitigate the risk of sunburn and long-term skin damage. November and December provide a slight respite with lower UV levels, yet caution is still encouraged in November where the UV Index remains very high.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| San Cayetano de Vacas | 8 | 10 | 13 | 14 | 14 | 14 | 14 | 14 | 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 |