Last updated: August 1, 2025
Awareness of the UV Index in Ejido Dieciocho de Marzo, Mexico is crucial for safeguarding skin health in this sunny locale. Understanding UV levels is essential not only for preventing sunburn but also for reducing the long-term risks of skin damage and even skin cancer. With a climate marked by high UV exposure, especially from late morning to early afternoon—where the UV Index peaks at a striking 12—residents and visitors alike must remain vigilant. By staying informed about daily UV levels, you can enjoy the beautiful weather while protecting your skin from harmful rays.
The UV Index throughout the day presents a dramatic rise and fall in sun exposure. Starting at a gentle 1 in the early hours of 7:00 AM and 8:00 AM, the index swiftly climbs to 3 by 9:00 AM. As the sun reaches its peak, the UV index skyrockets to a maximum of 12 at 1:00 PM, indicating high levels of UV radiation. Even in the afternoon, the index remains noteworthy: 11 at 2:00 PM and 10 at 3:00 PM. As the day transitions towards evening, levels dip gradually to 4 by 5:00 PM, and further down to 1 by 7:00 PM. This data underscores the importance of sun protection, especially during the midday hours when UV exposure is at its peak.
| 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 | 12 | extreme | 10 min |
| 14:00 | 12 | extreme | 10 min |
| 15:00 | 10 | very high | 15 min |
| 16:00 | 7 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
The UV Index varies significantly throughout the year, with high-risk months typically from February to September, where values reach their peak during April to August at an extreme level of 12. Visitors and residents should exercise caution during these months, especially due to the reduced burn time of just 10 minutes for peak exposure. Even in the earlier months like January, the UV Index of 6 poses a high risk, while October transitions to a lower but still significant 10, necessitating protective measures. To minimize the risk of sunburn and long-term skin damage, it is advisable to wear protective clothing, apply sunscreen regularly, and seek shade during peak sun hours, particularly between 10 AM and 4 PM.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ejido Dieciocho de Marzo | 6 | 9 | 10 | 12 | 12 | 12 | 12 | 12 | 12 | 10 | 7 | 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 |