Last updated: June 2, 2025
In Santo Tomas de Arriba, Mexico, staying informed about the UV Index is crucial for protecting your skin and overall health. High UV levels can lead to sunburn and long-term skin damage, making it essential to understand daily UV exposure. With a BSh climate, this vibrant locale experiences intense sunlight, especially during midday when the UV Index can soar to 14. By being aware of UV levels, residents and visitors can take necessary precautions to enjoy the sun safely, ensuring a healthier and more enjoyable outdoor experience.
The UV Index throughout the day presents a clear picture of sunlight intensity and its potential risk. Early risers at 07:00 and 08:00 will experience a mild index of 1, indicating minimal UV exposure. However, a notable increase begins at 09:00 with a jump to 3, suggesting that protective measures like sunscreen and hats should be considered. The UV levels peak dramatically from 11:00 to 14:00, reaching an intense 14 at 13:00—a clear alert for anyone planning outdoor activities to take ample precautions. As the afternoon transitions, the UV Index starts to decline, dropping to 5 by 17:00 and returning to a safe 1 by 19:00. It's essential to stay informed and protect your skin during those solar zenith 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 | 10 | very high | 15 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 14 | extreme | 10 min |
| 14:00 | 14 | extreme | 10 min |
| 15:00 | 12 | extreme | 10 min |
| 16:00 | 8 | very high | 15 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV Index levels exhibit significant fluctuations, with the highest risk occurring from February to November, where the index remains consistently high or extreme, particularly in March, April, May, July, and August, reaching peaks of 14 to 15. During these months, the burn time is notably short, at just 10 minutes, emphasizing the necessity for proactive sun protection. Conversely, January and December show slightly lower indices of 10 and 9, respectively, classifying them as very high risk months with a 15-minute burn time. To ensure safety, residents and visitors should diligently apply sunscreen, wear protective clothing, and limit sun exposure during peak hours, especially from late winter through early fall.
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 |
| Puebla UVI | 10 | 12 | 14 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 10 | 9 |
| Santo Tomas de Arriba | 10 | 13 | 14 | 15 | 15 | 14 | 15 | 14 | 14 | 13 | 11 | 9 |