Last updated: August 1, 2025
In San Luis San Pedro, Mexico, being aware of the UV Index is crucial for guarding your skin against harm from ultraviolet radiation. Understanding the levels of UV exposure can help you take necessary precautions, preventing painful sunburns and long-term skin damage. Known for its sunny climate, San Luis San Pedro experiences significant UV levels, peaking at 12—which represents a very high risk of harm from unprotected sun exposure, especially during the midday hours. Stay informed about the UV Index to enjoy the outdoors safely while keeping your skin health in check!
As the sun rises and its rays strengthen, the UV Index begins to rise, starting at a modest 0 at 7:00 AM. By 8:00 AM, it climbs to 1, signaling a gentle exposure risk. The real intensity kicks in around 10:00 AM, where the index reaches 4, marking the start of more significant sun exposure. With the sun at its peak, the index surges to 10 by noon and peaks at an impressive 13 between 1:00 PM and 2:00 PM. Attention is crucial here, as this level indicates a very high risk of harm from unprotected sun exposure. As the afternoon rolls on, the UV Index gradually decreases, dropping to 9 by 4:00 PM and winding down to 1 by 7:00 PM, reminding us that while the sun's height brings its ultimate strength, it eventually gives way to the cooling shadows of evening.
| 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 | 10 | very high | 15 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 13 | extreme | 10 min |
| 15:00 | 11 | extreme | 10 min |
| 16:00 | 8 | very high | 15 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
The UV Index experiences significant seasonal fluctuations, peaking during the warmer months. From January through April, the index rises sharply from 9 to 13, indicating extreme exposure risks, and continues to peak at 14 in June. The high-risk months of February through October maintain an extreme exposure category, with a consistent burn time of just 10 minutes. As we move into November and December, the index decreases to 9 and 8, respectively, returning to a very high exposure category with a burn time of 15 minutes. Visitors and residents are strongly advised to take protective measures during high UV periods, particularly between February and October, such as wearing sunscreen, protective clothing, and limiting sun exposure during peak hours.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| San Luis San Pedro | 9 | 11 | 13 | 13 | 13 | 14 | 13 | 13 | 13 | 11 | 9 | 8 |
| 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 |