Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Santa Casilda, Mexico, where the sun can be both a glorious ally and a formidable foe. With temperatures that soar, especially around noon, being aware of UV levels is essential for preventing sunburn and safeguarding your skin health. Santa Casilda, nestled in a Cwa climate zone, experiences intense sunlight, particularly during peak hours when the UV Index can reach levels as high as 14. By paying attention to these readings, you can enjoy the beautiful outdoor environment while taking necessary precautions to protect yourself from harmful UV radiation.
The UV Index data paints a vivid picture of the sun’s intensity as the day unfolds. Starting at 07:00, the index is at a safe 0, but by 08:00, it nudges up to 1, indicating a slight increase in UV exposure. As the clock strikes 10:00, things heat up — the index climbs to 4, urging early risers to take precaution. The real peak occurs during the midday hours, where 12:00 sees a blistering 10, escalating to an impressive 13 by 13:00. It reaches its zenith at 14:00 with a staggering 14, representing a critical point for sun safety. The afternoon brings a gradual decline, stretching from 12 at 15:00 down to 3 by 18:00, before settling at 1 as the sun sets at 19:00. This data underscores the importance of sun protection, especially during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 0 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 4 | moderate | 30 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 14 | extreme | 10 min |
| 15:00 | 12 | extreme | 10 min |
| 16:00 | 9 | very high | 15 min |
| 17:00 | 6 | high | 25 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index demonstrates significant seasonal fluctuations, with the highest values occurring during the summer and early fall months. Notably, from February to October, the UV index remains in the extreme category, peaking at 14 in April, June, July, and September. This period constitutes the high-risk months, where burn times are alarmingly short, limited to just 10 minutes. Conversely, January, November, and December see lower UV ratings classified as very high, with slightly longer burn times of 15 minutes. To ensure safety, visitors and residents are advised to take precautions during the high-risk months by wearing protective clothing, applying sunscreen, and seeking shade, especially during midday hours.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Santa Casilda | 9 | 11 | 13 | 14 | 13 | 14 | 14 | 13 | 14 | 11 | 9 | 8 |
| 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 |