Last updated: August 1, 2025
In General Juan Jose Rios, Mexico, being aware of the UV Index is crucial for anyone who enjoys the sun. Understanding UV levels can significantly impact sunburn prevention and overall skin health, especially in an area where temperatures soar and direct sunlight is prevalent. With a climate classified as BSk, residents and visitors are exposed to elevated UV risks—particularly during peak hours when the index reaches a maximum of 14 between 1:00 PM and 2:00 PM. Staying informed about the UV Index helps you make better choices for safe sun exposure, ensuring your time outdoors is both enjoyable and protective for your skin.
The UV Index for the day displays a clear progression of intensity as the sun climbs higher in the sky. Starting at 0 at 7:00 AM, the UV exposure begins to rise gradually, reaching 1 by 8:00 AM. By 10:00 AM, it escalates to 4, and from 11:00 AM onward, the intensity sharply increases, peaking at an impressive 14 between 2:00 PM and 3:00 PM. This is the moment to take extra precautions against sunburn, as UV radiation is at its highest. As the afternoon wanes, the index dips back to 7 by 5:00 PM, further declining to 4 by 6:00 PM, and finally settling at 1 by 7:00 PM. This pattern highlights the importance of sun safety during the midday hours when UV levels can be particularly harmful.
| 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 | 7 | high | 25 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 14 | extreme | 10 min |
| 15:00 | 12 | 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 |
The UV index varies significantly throughout the year, with the highest values observed from March to October, reaching an extreme level of 14 during the summer months (May through August). Visitors and residents should be particularly cautious from February to October, where burn times are as short as 10 minutes due to the extreme exposure category. January and November present a slightly lower UV index, categorized as very high, with a burn time of 15 minutes. By December, the UV index decreases to 7, making exposure risks lower, with a burn time of 25 minutes. It is essential for everyone to take protective measures against UV radiation, especially during the high-risk months, by wearing sunscreen, protective clothing, and seeking shade.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| General Juan Jose Rios | 8 | 11 | 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 |