Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Santa Maria de Guaymas, Mexico, where the desert climate predominantly contributes to higher UV exposure risks. With peak UV levels reaching as high as 12 during the midday sun, being aware of these readings can significantly aid in sunburn prevention and long-term skin health. This coastal town basks in abundant sunshine, making it essential to grasp how various UV levels impact your skin. By staying informed about the UV Index, you can enjoy the beautiful beaches while safeguarding your skin against harmful effects.
The UV Index provides a clear snapshot of sun exposure throughout the day, peaking at 12 around noon. Starting the morning at a mild level of 1 at 07:00, the index swiftly climbs, reaching 11 by 11:00. The intensity plateaus at its highest point of 12 between 12:00 and 13:00, indicating a critical time for sun safety. As the afternoon progresses, the UVI declines, dropping to 10 at 14:00, and gradually softening to 4 by 16:00. By the evening hours, the index falls back to a comfortable 1 by 18:00, making later hours more forgiving for outdoor activities. Stay protected and plan your sun exposure wisely!
| 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 | 11 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 10 | 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 |
The UV Index demonstrates significant seasonal variation, with the highest risks typically occurring from March to September. During this period, the UV Index peaks at 12 in April, May, June, and July, categorized as extreme, where a burn can occur in just 10 minutes. February and October also present high risks with UV Index values at 8 and 9, respectively, requiring 15 minutes for potential burns. Visitors and residents are advised to take precautionary measures during these months, such as wearing sunscreen with high SPF, protective clothing, and seeking shade, especially during peak sun hours. In contrast, January, November, and December feature lower UV indices, categorizing them as moderate or high, allowing for more leisurely outdoor activities with less risk of sunburn.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Santa Maria de Guaymas | 5 | 8 | 10 | 12 | 12 | 12 | 12 | 11 | 11 | 9 | 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 |