Last updated: June 2, 2025
In Primero de Mayo, Mexico, awareness of the UV Index is crucial for enjoying the sun safely and protecting your skin. Understanding UV levels is essential for preventing sunburn and maintaining long-term skin health, especially in a climate characterized by its warm temperatures and high sun exposure. With peak UV readings soaring to 13 around midday, residents and visitors alike must take precautions during these hours to safeguard themselves against the risks of overexposure. Being informed can help you enjoy the beautiful sunny days while staying healthy and protected!
The UV Index data paints a striking picture of the sun's intensity throughout the day. Starting off mildly at a low 1 at 7:00 AM, the index gradually rises to reach a notable peak of 13 by 1:00 PM. This notable surge signifies the sun’s most potent rays, best approached with caution. As the afternoon progresses, the UV levels begin to decline, dropping to 11 at 3:00 PM and further down to 5 by 5:00 PM. As evening sets in, the index recedes to a soft 1 by 7:00 PM, making it safe to enjoy the outdoors without the biting intensity of midday sun. For those planning outings, it's clear: the safest time to bask in the outdoors is earlier in the morning or later in the evening!
| 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 | 8 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 12 | 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, the UV Index experiences notable fluctuations, with high-risk months primarily occurring from February to October. March through September peak at an extreme UV Index of 13, requiring only 10 minutes of sun exposure before risking sunburn, while January and December are considered high with a UV Index of 7, allowing 25 minutes before burning. As the UV Index generally increases from a high of 9 in February to 13 in the summer months, and then gradually declines to 8 in November, it is crucial for visitors and residents to take preventive measures during the high and extreme categories. This includes wearing protective clothing, applying broad-spectrum sunscreen frequently, and seeking shade during peak sunlight hours, especially between February and October when the risk is significantly heightened.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Primero de Mayo | 7 | 9 | 12 | 13 | 13 | 13 | 13 | 13 | 12 | 11 | 8 | 7 |
| 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 |