Last updated: July 2, 2025
Understanding the UV Index in San Francisco Jayacaxtepec, Mexico, is crucial for anyone looking to protect their skin from the sun's potentially harmful rays. With UV levels reaching a peak of 15 around midday, being aware of these fluctuations can significantly aid in sunburn prevention and long-term skin health. Given the region's Aw climate, characterized by sunny days and ample UV exposure, recognizing the importance of UV awareness is key to enjoying the outdoors safely. Whether you're planning a hiking trip or simply enjoying a day in the sun, knowing the UV Index can help you make informed decisions to keep your skin healthy and protected.
The UV Index throughout the day presents a fascinating journey of sunlight intensity, peaking dramatically between 12 PM and 2 PM. Starting the morning with a gentle UV Index of 1 at 7 AM, the sun gradually warms up, reaching 3 by 9 AM. However, it's the midday sun that truly asserts itself, soaring to a striking 15 at 1 PM, when sun safety is paramount. As the afternoon progresses, the index begins to decline, dropping to 9 by 4 PM and fading to a tranquil 1 by 7 PM. With such a pronounced peak, it's essential to remain vigilant during those hours of highest exposure—remember to wear sunscreen, seek shade, and stay hydrated!
| 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 | 12 | extreme | 10 min |
| 16:00 | 9 | very high | 15 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, seasonal UV changes reveal significant variation, particularly between January and October, where the UV Index frequently reaches extreme levels. The high-risk months are clearly identified as February to September, with the UV Index peaking at 15 in May and July, which corresponds to a burn time of just 10 minutes. Visitors and residents are strongly advised to take precautionary measures during these months, including wearing protective clothing, applying broad-spectrum sunscreen, and seeking shade when possible. Outside of these high-risk months, the UV Index remains very high in January, November, and December, suggesting that caution should still be exercised year-round to minimize the risk of skin damage from UV exposure.
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 Francisco Jayacaxtepec | 10 | 12 | 14 | 14 | 15 | 14 | 15 | 13 | 14 | 12 | 10 | 9 |
| Puebla UVI | 10 | 12 | 14 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 10 | 9 |