Last updated: May 3, 2025
Understanding the UV Index is essential for everyone in Chapalilla, Mexico, where the sun can be especially fierce. With its Csa climate, residents and visitors alike face heightened risks of UV exposure, particularly during peak hours. Being aware of UV levels helps prevent painful sunburns and promotes long-term skin health, allowing you to enjoy the vibrant outdoors without the adverse effects of overexposure. With UV Index readings reaching as high as 13 between noon and 1 PM, knowing when to seek shade or apply sunscreen is crucial to protect your skin in this beautiful region.
The UV Index throughout the day showcases a dynamic rhythm of sun exposure. Starting the morning with a mild 1 at 7:00 AM, it steadily climbs as the sun rises higher, reaching 2 by 8:00 AM. A noticeable surge occurs by 9:00 AM, peaking at 10:00 AM with a robust 7. The intensity escalates to its maximum of 13 at both 12:00 PM and 1:00 PM, emphasizing the need for sun protection during these hours. As the afternoon progresses, the index begins to taper off, descending to 3 by 5:00 PM and finally winding down to a gentle 1 by 7:00 PM. This pattern highlights the crucial times to take precautions against UV exposure, making it key to enjoy the sun safely.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 13 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 12 | extreme | 10 min |
| 15:00 | 9 | very high | 15 min |
| 16:00 | 6 | high | 25 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
The UV Index exhibits significant seasonal fluctuations, with the highest levels typically occurring from March to October, when exposure is classified as extreme for most months. April holds the peak UV Index at 14, resulting in a minimal burn time of just 10 minutes. The months of January and February also present high risk, characterized by very high indices of 8 and 10, respectively, where a burn can occur in as little as 15 minutes. Visitors and residents should take precautions, especially during March through October, by wearing protective clothing, applying sunscreen, and seeking shade to mitigate the risks of overexposure. As the UV Index drops in November and December, with values of 9 and 7, the risk decreases, allowing for safer outdoor activities with longer burn times of 15 and 25 minutes. Overall, awareness of these seasonal changes is crucial for health and safety during outdoor activities.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chapalilla | 8 | 10 | 13 | 14 | 13 | 14 | 13 | 13 | 13 | 11 | 9 | 7 |
| 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 |