Last updated: July 2, 2025
Understanding the UV Index is essential for residents and visitors in San Pedro Numi, Mexico, where the unique Cwb climate amplifies sun exposure throughout the year. With UV levels often peaking around midday, reaching a staggering 15, it's crucial to grasp how these values can impact your skin health and the risk of sunburn. Being aware of UV levels empowers you to take preventive measures, ensuring that you can enjoy the sun while keeping your skin safe from harmful effects. With its beautiful landscapes, San Pedro Numi invites you to explore, but remember: knowledge of the UV Index is your best defense against the sun's powerful rays.
At dawn, the UV Index begins its ascent, starting from a gentle 1 at 7:00 AM, indicating minimal risk for sun exposure. By 9:00 AM, it reaches 3, prompting a little caution as the sun gains strength. However, the real intensity kicks in around 10:00 AM, with the UV Index soaring to 6, signaling a need for sun protection. The peak arrives at 12:00 PM, hitting an impressive 13, and from 1:00 PM to 2:00 PM, it maintains 15, marking a high risk for unprotected skin. As the day progresses into the afternoon, the index gradually declines to 10 at 4:00 PM, then drops to 6 by 5:00 PM, before evening brings relief with values returning to 2 by 6:00 PM and finally settling at 1 by 7:00 PM. Enjoy the sun, but don’t forget your sunscreen 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 | 15 | extreme | 10 min |
| 14:00 | 15 | extreme | 10 min |
| 15:00 | 13 | extreme | 10 min |
| 16:00 | 10 | very high | 15 min |
| 17:00 | 6 | high | 25 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
The UV Index displays a consistent pattern of extreme levels from January to July, with values peaking at 15 in March through June. This indicates a significant risk for skin damage, with a minimal exposure burn time of just 10 minutes throughout these months. The intensity slightly decreases in August and September to 14, followed by a drop to 13 in October and 11 in November. December shows a further decline to a very high level of 9, allowing for a lengthened burn time of 15 minutes. Visitors and residents are strongly advised to take precautionary measures, particularly during the high-risk months from January to October, by applying broad-spectrum sunscreen, wearing protective clothing, and limiting sun exposure during peak hours to maintain skin health and safety.
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 |
| Puebla UVI | 10 | 12 | 14 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 10 | 9 |
| San Pedro Numi | 11 | 13 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 11 | 9 |