Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors of San Miguel Reagui, Mexico, where the sun shines brightly in a Cwb climate. With peak UV levels soaring to 14 around midday, awareness of these levels is essential for effective sunburn prevention and maintaining long-term skin health. By keeping an eye on the daily UV Index, you can make informed decisions about sun protection and outdoor activities, ensuring you enjoy the vibrant scenery of San Miguel while safeguarding your skin from harmful rays. Remember, even when the UV Index seems low, it’s important to stay protected and minimize risk!
The UV Index reveals a dynamic progression throughout the day, beginning with a gentle rise at 07:00 and 08:00 where it remains low at 1. By 09:00, it escalates to 3, but the real intensity hits its peak between 11:00 and 13:00, soaring to a staggering 13 and hitting a maximum of 14 at 13:00. As the sun begins its descent, the index drops gradually, falling to 11 by 15:00, then retreating to 8 at 16:00. As the evening approaches, the UV Index continues its decline, settling at 2 by 18:00 and finally resting at a mere 1 by 19:00. This hourly fluctuation underscores the importance of sun safety during peak hours, particularly between 11:00 and 13:00, when UV exposure is at its highest.
| 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 | 10 | very high | 15 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 14 | extreme | 10 min |
| 14:00 | 13 | extreme | 10 min |
| 15:00 | 11 | extreme | 10 min |
| 16:00 | 8 | very high | 15 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index exhibits significant seasonal variations, peaking in the summer months. January starts with a UV Index of 10 (very high), but by February, it rises sharply to 12 (extreme), and continues to escalate until it reaches its maximum in July at 15 (extreme). This elevated threat persists through August, dropping only slightly to 14 in September and back down to 12 in October. The high-risk months for UV exposure are February through September, where the UV Index consistently stays at 12 or above. Residents and visitors are strongly advised to take precautions during these periods, including wearing sunscreen, protective clothing, and limiting sun exposure to avoid skin damage, especially during peak hours when burn time can be as little as 10 minutes. As winter approaches, UV levels decrease, but it's still vital to maintain sun safety practices in November and December, where the UV Index is 10 and 9, respectively.
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 |
| San Miguel Reagui | 10 | 12 | 14 | 14 | 14 | 14 | 15 | 13 | 14 | 12 | 10 | 9 |
| Puebla UVI | 10 | 12 | 14 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 10 | 9 |