Last updated: July 2, 2025
Understanding the UV Index is crucial in Estancia Vieja (San Jose la Estancia), where the sun shines brightly in this warm climate zone. With UV levels peaking at a hazardous 13 around midday, awareness of UV exposure can lead to effective sunburn prevention and long-term skin health. The local climate presents unique challenges, as residents and visitors must navigate significant UV risks throughout the day. By staying informed about UV fluctuations—from a mild 1 in the early morning to extremes during peak hours—individuals can take proactive steps to safeguard their skin while enjoying the beautiful outdoors.
The UV Index during the day reveals an intense sun reaching its peak between 12:00 PM and 1:00 PM, with an impressive UV Index of 13. Starting from a calm 0 at 7:00 AM, the index gradually rises, hitting 8 by 11:00 AM. As the clock strikes noon, it escalates sharply to 11, indicating a high risk of harm from unprotected sun exposure. The intensity remains strong at 13 from 1:00 PM to 2:00 PM, before beginning its decline in the afternoon. By 5:00 PM, the index drops to 5, and as the sun sets, it wanes to 1 by 7:00 PM. This data underscores the importance of sun protection during the peak hours of 11 AM to 2 PM when the UV levels are the most severe.
| 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 | 5 | moderate | 30 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 13 | 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 |
Throughout the year, UV levels exhibit significant seasonal changes, peaking during the spring and summer months. High-risk periods occur from February to October, with the UV Index reaching extremes of 12 to 15 and a consistent burn time of just 10 minutes during this critical timeframe. Notably, March and April showcase the highest levels of UV exposure, prompting advisories for vigilance and protection. As we transition into November and December, UV Index levels decrease slightly, but still remain in the very high category, particularly in November. For both visitors and residents, it's essential to prioritize sun safety during these months by using sunscreen, wearing protective clothing, and seeking shade, especially during peak sunlight hours.
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 |
| Iztapalapa UVI | 10 | 12 | 14 | 15 | 14 | 14 | 14 | 14 | 14 | 12 | 10 | 8 |
| Estancia Vieja (San Jose la Estancia) | 10 | 12 | 15 | 15 | 14 | 14 | 13 | 14 | 14 | 12 | 10 | 9 |
| 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 |