Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of 17 de Octubre, Mexico, where the sun's rays can pose significant risks, especially in the region's BSh climate. Being aware of UV levels helps in preventing sunburn and protecting skin health, ensuring that outdoor activities are enjoyable and safe. With peak UV Index values reaching as high as 12 around noon, residents must stay vigilant to mitigate potential harm from excessive sun exposure, particularly during the hottest hours of the day. Gear up for healthy sun practices to enjoy the beautiful climate while safeguarding your skin!
At dawn, the UV Index starts low at 1 by 7:00 AM, providing a gentle reminder of the sun's presence. As the morning progresses, the index climbs to 3 by 8:00 AM, and then peaks at 12 around noon, signaling intense sun activity. The sun's rays are strongest at 11:00 AM with a maximum of 10, making it crucial to protect your skin during this time. Though the UV Index begins to decline after midday, it remains significant at 11:00 AM and 9 by 2:00 PM. By the late afternoon, the numbers drop to 4 at 4:00 PM and further descend to 1 by 6:00 PM. Plan your sun exposure wisely, taking care to avoid the peak hours when protection is vital!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 10 | very high | 15 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 | 1 | low | 45 min |
Throughout the year, the UV Index experiences significant fluctuations, with the highest values occurring in the spring and summer months. Specifically, from April to September, the UV levels peak at an extreme category of 12, making these the high-risk months for sun exposure. During this period, burn times are notably short, ranging from only 10 minutes. In contrast, the UV Index is lower in the winter months, with January having a high category of 6 and December dropping to a moderate 5, allowing for longer burn times of 30 minutes. Visitors and residents are advised to take precautions during high UV months by wearing protective clothing, applying sunscreen frequently, and seeking shade, especially during midday hours. Staying informed about the daily UV index can help mitigate the risks associated with sun exposure.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 17 de Octubre | 6 | 8 | 10 | 12 | 12 | 12 | 12 | 12 | 12 | 10 | 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 |