Last updated: August 1, 2025
Understanding the UV Index is crucial for residents and visitors of San Juan Nepomuceno, Mexico, where the sun can pose significant risks, especially during midday hours. Awareness of UV levels helps in preventing sunburn and protecting skin health, which is vital for enjoying the beautiful outdoor climate that this charming locale offers. With a Cwb climate, San Juan Nepomuceno experiences pronounced UV intensity, peaking at a striking 14 around 1:00 PM, necessitating proactive measures to safeguard against harmful exposure. Stay informed and keep your skin healthy while reveling in the sun's warm embrace!
As the sun climbs higher in the sky, the UV Index reflects its strength, peaking dramatically around midday. Starting the day with a mild UV Index of 1 at 07:00, the intensity begins to increase steadily. By 10:00, it escalates to 5, but the real surge occurs between 11:00 and 14:00, where the index skyrockets to an impressive 15 at 14:00. This is a crucial reminder for outdoor enthusiasts to protect themselves during these hours, as the UV levels are at their highest. After reaching its zenith, the index gradually descends, dipping to 9 by 16:00 and falling to a safer 3 by 18:00, leaving the evenings more benign with a last index of 1 at 19:00. Stay safe and enjoy the sunshine wisely!
| 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 | 12 | extreme | 10 min |
| 13:00 | 14 | extreme | 10 min |
| 14:00 | 14 | 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 |
The UV Index experiences significant seasonal fluctuations, with the highest levels occurring from March to October. During these months, particularly from February through October, the UV Index frequently reaches extreme levels, demanding caution from both visitors and residents. March, April, May, June, July, August, and September all see an index of 14 or higher, with July peaking at 15. The burn time during these high-risk months is notably short—just 10 minutes of unprotected exposure can lead to harmful skin effects. Consequently, it is crucial for everyone to wear sunscreen, seek shade, and don protective clothing, particularly during these peak months. Conversely, January, November, and December display lower UV levels with a very high to high exposure category, allowing for slightly longer burn times of 15 minutes; however, caution is still advised.
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 Juan Nepomuceno | 10 | 12 | 14 | 14 | 14 | 14 | 15 | 14 | 14 | 12 | 10 | 9 |
| Puebla UVI | 10 | 12 | 14 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 10 | 9 |