Last updated: August 1, 2025
In San Jose (San Jose de los Melendez), Mexico, understanding the UV Index is crucial for protecting your skin and overall health. With its Cwa climate, the region experiences intense sun exposure, especially between 11 AM and 3 PM, when UV levels can soar to a staggering 14. Being aware of these fluctuations is essential for preventing sunburn, reducing the risk of skin damage, and enjoying outdoor activities safely. By staying informed about UV levels, locals and visitors alike can make better choices to safeguard their skin against harmful rays—ensuring a healthy and enjoyable time in the sun!
The UV Index data for the day reveals a striking rise in sun intensity as the morning progresses. Starting with a minimal value of 0 at 07:00, the index gradually escalates. By 10:00, it reaches 4, indicating a moderate level of UV exposure. The real peak occurs around 12:00, where it soars to an impressive 11, marking it as a time when precautions are essential. The highest point comes at 14:00 with a UVI of 14, representing extreme risk levels. As the afternoon unfolds, the index begins its descent, dropping to 12 at 15:00 before tapering off further to 3 by 18:00 and finally returning to 1 at 19:00. This data emphasizes the need for sun protection during those peak afternoon hours when UV radiation is at its most potent.
| 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 | 11 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 14 | extreme | 10 min |
| 15:00 | 12 | extreme | 10 min |
| 16:00 | 10 | very high | 15 min |
| 17:00 | 6 | high | 25 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
The UV Index experiences significant seasonal variation, with highest levels occurring from February to October, where the exposure category remains categorized as extreme for most of that period. Notably, April registers the peak UV Index at 15, signifying the critical risk of sunburn with a burn time of just 10 minutes. The high-risk months are predominantly from February through October, where visitors and residents should exercise extreme caution, utilizing sunscreen, protective clothing, and limited sun exposure during peak hours. As UV levels start to decline in November and December, individuals can still expect very high UV Index readings, with burn times of 15 minutes. It is essential for everyone to remain vigilant about sun protection year-round, especially during these high-risk months.
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 |
| San Jose (San Jose de los Melendez) | 9 | 11 | 14 | 15 | 14 | 14 | 14 | 14 | 14 | 12 | 10 | 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 |