Last updated: June 2, 2025
In Ciudad Constitución, Mexico, awareness of the UV Index is crucial for ensuring the health and safety of its residents and visitors. Understanding UV levels is vital not only for preventing sunburn but also for promoting long-term skin health and reducing the risk of skin-related issues. With a BWh climate, Ciudad Constitución typically experiences intense sunlight, especially during midday hours when the UV Index can soar. From late morning to early afternoon, UV levels can reach as high as 13, making it essential for everyone to take protective measures to enjoy the sun safely.
As the sun rises, the UV Index starts off relatively low, peaking at 1 from 7:00 AM to 9:00 AM. However, the intensity quickly escalates, reaching 3 at 9:00 AM and hitting a striking 5 by 10:00 AM. From 11:00 AM to 1:00 PM, the UV levels soar, peaking at a blistering 13 at 1:00 PM, making this the most dangerous period for sun exposure. As the day progresses, the index begins to moderate, dropping to 8 by 4:00 PM and continuing to decline until it settles back at 1 by 7:00 PM. It's crucial to stay protected during those midday hours when the sun's rays are at their strongest!
| 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 | 5 | moderate | 30 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 13 | 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 |
Throughout the year, UV Index levels fluctuate significantly, with high-risk months identified primarily from February to September. The UV Index peaks in March, April, May, and June at a critical 13, categorized as extreme, where the burn time is reduced to just 10 minutes. Visitors and residents should be particularly vigilant during these months, ensuring adequate sun protection such as using sunscreen, wearing protective clothing, and seeking shade when possible. As we transition into the cooler months, October and November still present elevated UV risks with indices of 10 and 8, respectively, signaling visitors to maintain sun safety practices. In the winter months, although the UV Index is lower, with values of 7 in January and 6 in December, it is advisable to remain cautious, especially on sunny days.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ciudad Constitucion | 7 | 9 | 11 | 13 | 13 | 13 | 12 | 12 | 12 | 10 | 8 | 6 |
| 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 |