Last updated: July 2, 2025
In San Matias Petacaltepec, Mexico, understanding the UV Index is crucial for residents and visitors alike. With a climate categorized as Cwb, this region experiences periods of intense sun exposure, particularly between 10:00 AM and 2:00 PM, when UV levels can reach a staggering 15. Being aware of the UV Index helps in preventing sunburn and promoting long-term skin health, crucial in a place where sunburn risk escalates rapidly. By staying informed about UV levels, you can take proactive measures to protect yourself and enjoy the beautiful outdoors of San Matias Petacaltepec safely.
As the sun rises, the UV Index starts off gently, reaching a maximum of 1 by 7:00 AM. However, as the day progresses, it climbs dramatically, peaking at an intense 15 by 1:00 PM. The UV intensity is particularly strong between 11:00 AM and 2:00 PM, with values soaring to a staggering 13 at noon and 14 by 2:00 PM. After this midday surge, the index gradually drops, settling back to a moderate 5 by 5:00 PM and declining further to 1 by 7:00 PM. It's essential to protect your skin during those peak hours to ensure safe and enjoyable outdoor activities!
| 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 | 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 exhibits significant seasonal variation, peaking during the months of February through October, where the index consistently falls within the extreme category (10-15) and the burn time is notably short at 10 minutes. March, April, May, July, and August see UV Index levels reaching their highest at 15, indicating very high risk for skin damage from sun exposure. January and November are also identified as high-risk months, with UV levels at 10, but with a slightly longer burn time of 15 minutes. During these peak months, it is crucial for both visitors and residents to take protective measures, such as wearing sunscreen, hats, and protective clothing, and seeking shade during the hottest parts of the day to minimize UV exposure and reduce the risk of sunburn.
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 Matias Petacaltepec | 10 | 13 | 14 | 15 | 15 | 14 | 15 | 14 | 14 | 12 | 10 | 9 |
| Puebla UVI | 10 | 12 | 14 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 10 | 9 |