Last updated: August 1, 2025
In Guillermo Zuniga, Mexico, staying informed about the UV Index is essential for protecting your skin and overall health. With UV levels peaking at a dangerous 12 around midday due to the area's BSh climate, understanding these fluctuations helps in preventing sunburn and reducing long-term skin damage. As the sun rises, so does the intensity of UV radiation, climbing from a mild 1 in the early morning to a risky 13 by 2 PM. Being vigilant about UV exposure not only preserves your skin health but also enhances your outdoor enjoyment in this vibrant locale.
At sunrise, the UV Index remains low at 1 from 7:00 AM to 9:00 AM, making it a safe time for early outdoor activities. However, as the sun climbs higher, expect a notable increase at 10:00 AM with a UV Index of 5, signaling the need for caution. The intensity peaks spectacularly at 12:00 PM with a striking 11, reflecting the sun's zenith and urging sun protection measures. The afternoon sees an even sharper rise, reaching a maximum UV Index of 13 at 2:00 PM, where sun safety becomes paramount. As the day progresses, the index gradually declines, dipping back to 5 by 5:00 PM and tapering off to 1 by sunset at 7:00 PM. Enjoy the sunshine, but don’t forget to stay protected during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 0 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 4 | moderate | 30 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 12 | 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 |
As the seasons change, the UV Index fluctuations indicate varying levels of solar intensity, with high to extreme risk occurring primarily from February to September. March through August sees the highest UV Index values, peaking at 13 in July and August, representing an extreme exposure category where burn time is limited to just 10 minutes. Notably, visitors and residents should be particularly vigilant during these months and take protective measures such as wearing sunscreen, covering up, and seeking shade to mitigate the risks of sun damage. As the year progresses into late fall and winter, UV levels decrease, with the lowest values in December, but caution is still advised, particularly since even moderate UV exposure can be harmful.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Guillermo Zuniga | 7 | 9 | 11 | 12 | 12 | 12 | 13 | 13 | 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 |