Last updated: June 2, 2025
Understanding the UV Index in San Agustin Zapotlan, Mexico, is crucial for protecting your skin from harmful ultraviolet rays. With peak UV levels frequently reaching 15 during midday, awareness of these fluctuations can be the key to preventing sunburn and safeguarding your long-term skin health. Given the region's temperate highland climate, locals and visitors alike face unique challenges regarding UV exposure—especially in the summer months when the sun's intensity is at its highest. Stay informed and enjoy the sun safely by monitoring the UV Index, ensuring your outdoor activities are both enjoyable and protective.
The UV index throughout the day paints a vivid picture of sun exposure. Starting slow at 07:00 and 08:00 with low readings of 1, it quickly ramps up. By 09:00, the index reaches 3, signaling a gentle rise in sun intensity. Things heat up significantly at 10:00 with a dramatic jump to 6, before peaking at a scorching 15 between 13:00 and 14:00. With the sun at its zenith around 12:00, the index hits a staggering 13, urging caution for outdoor plans. Gradually, the UV levels begin to decline post-14:00, settling back to a safe 3 by 18:00 and a cool 1 by 19:00. Always remember to protect your skin during those critical midday hours!
| 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 | 6 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 15 | extreme | 10 min |
| 14:00 | 15 | extreme | 10 min |
| 15:00 | 13 | 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 |
During the year, seasonal UV changes show significant fluctuations, with highest UV levels occurring from February to October. This period includes several high-risk months for sun exposure, particularly from March to October, where the UV Index reaches extreme levels (14-15), with a burn time of just 10 minutes. Conversely, January, November, and December experience very high UV Index ratings (9-10), with longer burn times of 15 minutes. Visitors and residents are strongly advised to take extra precautions during these high-risk months, including wearing protective clothing, applying broad-spectrum sunscreen with an SPF of 30 or higher, and seeking shade during peak hours to minimize the risk of UV-related harm.
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 |
| 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 |
| San Agustin Zapotlan | 9 | 12 | 14 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 10 | 8 |
| Puebla UVI | 10 | 12 | 14 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 10 | 9 |