Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in San Isidro Ojo de Agua, Mexico, where the sun's rays can be intense, especially during peak hours. With population growth and outdoor activities on the rise in this charming town, being aware of UV levels plays a vital role in preventing sunburn and promoting skin health. On a typical day, the UV Index peaks at an extreme level of 13 between noon and 1 PM, highlighting the necessity for sun protection during these hours. Given the Cwa climate—characterized by distinct wet and dry seasons—it's essential to stay informed about UV exposure risks to enjoy the beautiful outdoors safely while safeguarding your skin.
The UV Index for the day reveals a dramatic rise in sun exposure as the hours progress. Starting at a mere 0 at 07:00, it gently climbs to 1 by 08:00, before making a noticeable leap to 2 at 09:00. The sun really starts to assert its power around 10:00, with a UV Index of 4, reaching 7 by 11:00. The peak intensity occurs at 12:00, where it soars to a staggering 11, followed closely by a maximum of 13 at both 13:00 and 14:00. As the afternoon wanes, the intensity begins to decline, falling to 12 at 15:00, then tapering down to 9 at 16:00. The evening offers some respite, with the index dropping to 6 at 17:00, 3 by 18:00, and finally settling at 1 as the sun sets at 19:00. This pattern highlights the importance of sun protection 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 | 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 seasonal UV changes indicate a significant increase in UV Index values from January to October, peaking at 14 during the months of March through June, categorized as extreme exposure with a burn time of only 10 minutes. Following this peak, UV levels gradually decrease but remain high in the late summer and early fall months, notably staying in the 13 range from July to September, before dropping to 12 in October. November and December see a return to very high levels, with indices of 9 and 8 respectively, allowing for slightly longer burn times of 15 minutes. As a result, it is crucial for both visitors and residents to take precautions during the high-risk months of February through October by wearing appropriate sun protection, seeking shade, and limiting sun exposure, especially during peak hours, to minimize the risk of skin damage.
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 Isidro Ojo de Agua | 9 | 11 | 14 | 14 | 14 | 14 | 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 |