Last updated: August 1, 2025
Understanding the UV Index is crucial for residents of San Jose del Rio, Mexico, where the climate tends to be dry and sunny, leading to significant UV exposure. Being aware of UV levels is essential for sunburn prevention and maintaining skin health, as high UV radiation can cause severe skin damage and increase the risk of skin cancer. In this region, peak UV Index values soar to dangerous levels, especially between 12 PM and 3 PM, where readings can reach a staggering 14. By staying informed about the daily UV Index, you can take proactive measures to protect yourself and enjoy the beautiful San Jose del Rio sun safely.
As the sun rises, the UV Index remains at a refreshing 0 at 7:00 AM, gradually climbing to a mild 1 by 8:00 AM. By 9:00 AM, it reaches 2, hinting at the day’s increasing brightness. The heat truly begins to set in by 10:00 AM, where it spikes to a 5, and by 11:00 AM, it surges to 8. The peak of the day arrives at 12:00 PM with a high of 11, followed closely by an intense 14 that lasts from 1:00 PM to 2:00 PM. A slight decline begins at 3:00 PM, dropping to 13, then tapering off to 10 by 4:00 PM. As evening approaches, the index gently falls to 7 at 5:00 PM, before dwindling to a gentle 3 at 6:00 PM, and finally settling at a serene 1 as the day fades into night. A perfect reminder to stay protected from the sun’s rays during peak hours!
| 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 | 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 |
The UV Index exhibits significant seasonal variations, with the highest values typically recorded between February and October. During these months, particularly March through October, the UV Index reaches extreme levels, peaking at 15 in both April and May, providing only a brief burn time of 10 minutes. January and December are classified as very high with values of 8, allowing a slightly longer burn time of 15 minutes. As high-risk months, February to October demand increased awareness and protection methods to prevent sunburn and longer-term health issues. Visitors and residents are strongly advised to apply broad-spectrum sunscreen, wear protective clothing, and seek shade during peak hours to mitigate the risks associated with intense 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 |
| San Jose del Rio | 8 | 11 | 13 | 15 | 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 |