Last updated: May 3, 2025
In Primero de Mayo, Mexico, understanding the UV Index is crucial for safeguarding your skin and overall health. With UV levels peaking at 12 around midday, awareness of these fluctuations can help prevent sunburn and long-term skin damage. The region's BSh climate typically means plenty of sunny days, which heightens the risk of overexposure to harmful UV rays. By keeping an eye on the UV Index, you can enjoy the sun safely and protect your skin while exploring the beauty of your surroundings.
As the sun rises, UV Index levels begin to climb, starting at a mild 1 by 07:00. By 08:00, it escalates to 3, signaling the day's first hints of intensity. At 09:00, the index reaches 6, prompting a cautious reminder for sun protection. The peak arrives around 12:00, where it soars to a staggering 12, indicating extremely high exposure levels. Even at 13:00, it remains dangerously elevated at 11, but gradually declines, dropping to 9 by 14:00. As daylight wanes, the UV Index falls to 7 by 15:00, then ebbs to 4 at 16:00, and finally retreats to 2 by 17:00. By the end of the day, as the sun sets, the index plummets to 0 at 19:00, offering reprieve from the sun’s fierce rays. Remember to stay protected during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 6 | high | 25 min |
| 10:00 | 9 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, UV index levels exhibit notable seasonal changes, with the highest risk occurring from April through August, when the UV Index peaks at 12—classified as extreme exposure. During these months, the burn time is critically low at just 10 minutes, emphasizing the importance of protection. February and March also present significant risks with a very high UV Index of 8 and 10 respectively, leading to burn times of 15 minutes. Visitors and residents are strongly advised to take precautions during high-risk months, including using sunscreen, wearing protective clothing, and seeking shade, especially when the sun is at its highest. Conversely, the UV Index decreases significantly in the fall and winter months, reaching a moderate level in December, where a burn time of 30 minutes can be expected.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Primero de Mayo | 6 | 8 | 10 | 12 | 12 | 12 | 11 | 12 | 11 | 9 | 7 | 5 |
| 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 |