Last updated: June 2, 2025
In Ribera la Union (Castano), understanding the UV Index is crucial for maintaining skin health and preventing sunburn, especially in a region characterized by its Cwb climate, where both humidity and UV exposure can be high. The daily UV Index here peaks at an alarming 14 around noon, indicating a significant risk for skin damage without proper protection. Knowing UV levels helps residents and visitors alike take proactive measures—whether it’s applying sunscreen, wearing protective clothing, or seeking shade during peak hours. Stay informed and safeguard your skin against the sun's harmful rays as you enjoy the beautiful outdoors of Ribera la Union.
At dawn, the UV Index starts off low, with a maximum of 1 at both 07:00 and 08:00. As the sun climbs higher, the intensity begins to rise sharply, reaching 3 by 09:00 and jumping to 6 by 10:00. The real heat hits at 11:00, peaking at a scorching 10, before hitting an astonishing 13 at 12:00 and peaking at 14 by 13:00. The afternoon witnesses a slight decline, settling back to 13 at 14:00 and dropping to 11 by 15:00. As the day winds down, the UV Index continues to lessen, falling to 7 at 16:00, and further slipping to 4 by 17:00. By 18:00, it's down to 2, and as night falls, it returns to a safe 1 by 19:00. Be sure to stay sun safe during peak hours when the UV Index soars!
| 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 | 7 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Seasonal changes in the UV Index highlight significant risks for both visitors and residents, particularly from February to October, when the UV Index reaches extreme levels. The highest risk occurs in July, with an index of 15, demanding protective measures within just 10 minutes of sun exposure. Conversely, January, November, and December show lower UV levels, classified as very high, with burn times of 15 minutes. To minimize the risk of skin damage, it is crucial during high-risk months to seek shade, wear protective clothing, and apply sunscreen frequently, especially during midday hours when the sun is at its peak intensity. Stay vigilant, and prioritize health alongside outdoor activities!
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 |
| Ribera la Union (Castano) | 10 | 12 | 14 | 14 | 14 | 14 | 15 | 13 | 13 | 12 | 10 | 9 |
| 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 |