Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors of Colonia Constitucion, Mexico, especially given its sunny climate and typical exposure risks associated with high temperatures. As ultraviolet radiation levels rise, so do the chances of sunburn and long-term skin damage, making it essential for everyone to remain informed. With UV Index readings peaking at a staggering 14 during the midday hours, vigilance is key to protecting your skin health. By recognizing and tracking these levels, you can enjoy the beautiful weather while safeguarding yourself against the harmful effects of the sun.
At sunrise, the UV Index begins at a safe 1 at 07:00, indicating low levels of ultraviolet radiation. As the morning progresses, it gradually climbs to 3 by 09:00, making sun protection a good idea as we approach midday. The real intensity arrives around 12:00, when the UV Index skyrockets to 13, peaking at 14 by 13:00 and 14:00—conditions that call for extra caution. After this peak, there's a gradual decrease, dropping to 9 by 16:00 and further down to 5 by 17:00, signaling a return to more manageable levels. As the day winds down, the UV Index falls back to 2 by 18:00, finally resting at a low 1 by 19:00. Always remember to protect your skin during those peak hours!
| 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 | 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 high-risk months primarily occurring from February through October. During this period, the UV Index reaches extreme levels, peaking at 15 in April, May, July, and fluctuating between 12 and 14 in other summer months. Burn times are notably short, with exposure times as little as 10 minutes required for potential sunburn. Residents and visitors are strongly advised to take precautions during these months; this includes wearing protective clothing, applying broad-spectrum sunscreen, seeking shade, and avoiding peak sun hours whenever possible. As we transition into November and December, the UV Index decreases to 10 and 9, respectively, allowing for a moderate level of exposure, although caution is still recommended.
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 |
| Colonia Constitucion | 10 | 12 | 14 | 15 | 15 | 14 | 15 | 14 | 14 | 12 | 10 | 9 |
| Puebla UVI | 10 | 12 | 14 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 10 | 9 |