Last updated: June 2, 2025
Understanding the UV Index is crucial for the residents and visitors of San Julio, Mexico, where the sunny climate can pose significant risks for skin health. With peak UV levels often reaching as high as 13 around midday, awareness of these fluctuating numbers is essential for preventing sunburn and long-term skin damage. In this vibrant town, where outdoor activities are a staple, understanding UV exposure can help ensure a safe and enjoyable experience under the sun. By staying informed about the UV Index, you can better protect yourself and your loved ones in San Julio’s intense sun, making your time in this beautiful location both fun and safe.
This hour-by-hour UV Index data reveals a striking pattern throughout the day. Starting off gently at 1 at 07:00 and 08:00, the intensity begins to rise gradually, reaching 2 by 09:00. The sun's rays become increasingly potent as the clock ticks, hitting 4 at 10:00 before skyrocketing to 7 at 11:00. The peak occurs in the early afternoon, with a scorching 10 at 12:00 and reaching an intense 13 at 14:00. Following this zenith, the UV Index begins to taper off, descending to 12 by 15:00, then dropping to 9 at 16:00. As the day cools, the UVI continues to decline, finding itself at 3 by 18:00 and returning to a more manageable 1 at 19:00. In summary, the UV exposure is highest between 11:00 and 14:00, making those hours critical for sun safety.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | 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 | 12 | extreme | 10 min |
| 14:00 | 13 | 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 UV Index shows a significant increase in UV radiation as the year progresses, with high-risk months primarily occurring from February to October, where the index reaches extreme levels of 12 to 14. March through October consistently presents dangers of severe sunburn within just 10 minutes of exposure. In contrast, January, November, and December maintain a high or very high risk but allow for longer burn times of 15 to 25 minutes. To ensure safety, both visitors and residents are strongly advised to wear adequate sun protection, including sunscreen, hats, and UV-protective clothing, particularly during these peak months to minimize the risk of skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| San Julio | 7 | 10 | 12 | 14 | 14 | 13 | 13 | 13 | 13 | 11 | 8 | 6 |
| 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 |