Last updated: June 2, 2025
In San Juan Mazatlán, Mexico, being aware of the UV Index is crucial for protecting your skin from harmful solar radiation. Understanding UV levels helps you prevent sunburn and promotes long-term skin health, allowing you to enjoy the sunny beachside lifestyle with confidence. With a climate characterized by warm temperatures and abundant sunshine, this coastal gem faces significant UV exposure, especially during midday hours when the index can soar as high as 13. Stay informed about the UV Index to safeguard your skin and make the most of your time in this tropical paradise!
As the sun rises, the UV Index begins modestly at 1 between 07:00 and 08:00, signaling a gentle start to the day. However, by 09:00, it's on the rise to 3, hinting at the increasing intensity of UV radiation. The midday hours see a dramatic surge, peaking at a scorching 13 by 13:00. This period between 11:00 and 14:00 is particularly critical, with values soaring to 9 and 12, urging caution for outdoor activities. As the afternoon rolls in, the index gradually retreats, dropping to 11 at 15:00 and then declining further to 4 by 17:00, indicating a safe return to outdoor pursuits as evening approaches. The UV risk diminishes significantly by 18:00, resting at 2, before settling back to 1 as dusk falls. Stay sun smart and protect your skin 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 | 12 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 13 | extreme | 10 min |
| 15:00 | 11 | extreme | 10 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 |
Throughout the year, UV index levels fluctuate significantly, peaking during the late spring and summer months. From February to October, the UV index consistently remains in the extreme category, with the highest readings in April, May, June, and July, all reaching a UV index of 14 and a burn time of just 10 minutes. As such, March through October is deemed the high-risk period for skin damage and sunburn. Visitors and residents are strongly advised to take precautions, including wearing protective clothing, applying broad-spectrum sunscreen frequently, and seeking shade—especially during midday hours—to reduce the risk of harmful UV exposure. In contrast, November and December see a decrease in UV levels, transitioning to a very high category, but it’s still important to stay vigilant as burn times extend to 15 minutes.
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 |
| San Juan Mazatlan | 9 | 12 | 13 | 14 | 14 | 14 | 14 | 13 | 13 | 12 | 10 | 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 |