Last updated: August 1, 2025
Understanding the UV Index in San Jose Chacaya, Guatemala, is essential for safeguarding your skin and overall health. With the region's Cwb climate, which typically features a mix of sun and occasional clouds, awareness of UV levels is crucial for preventing sunburn and long-term skin damage. Notably, peak UV values reach an intense 15 around noon, posing significant risks during outdoor activities. By keeping an eye on the UV Index, you can enjoy the beautiful landscape of San Jose Chacaya while ensuring your skin stays protected.
The UV Index reveals a dramatic rise in solar intensity throughout the morning, starting at a modest 1 at 07:00. As the day progresses, the index climbs steeply, peaking at an intense 15 by noon, exposing the midday sun's powerful rays. This peak is followed by a slight decline, with values dropping to 11 at 14:00, then tapering off to 7 by 15:00. As evening sets in, the index weakens, falling back to 1 by 17:00 and eventually reaching 0 by 19:00, signaling a conclusion to the sun's harmful effects. Be sure to protect yourself during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 7 | high | 25 min |
| 10:00 | 10 | very high | 15 min |
| 11:00 | 13 | extreme | 10 min |
| 12:00 | 14 | extreme | 10 min |
| 13:00 | 13 | extreme | 10 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV Index data indicates a consistent period of extreme UV exposure from January through October, with values peaking at 16 in April. Notably, high-risk months for skin damage are from February to May, corresponding with some of the highest UV readings. In these months, individuals should be particularly cautious, as the burn time is only 10 minutes across all cases during this time. As the summer months progress, while the UV Index remains elevated, there is a slight decrease, with August to October recording values between 14 and 15. Visitors and residents are strongly advised to take proactive measures, including wearing sunscreen, protective clothing, and limiting sun exposure, especially during peak hours, to mitigate the risks associated with these extreme UV levels. As December approaches, while the UV Index decreases slightly to 10, the burn time increases to 15 minutes, indicating a marginally lower risk but still necessitating sun protection practices.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Petapa UVI | 11 | 13 | 14 | 15 | 14 | 14 | 14 | 14 | 14 | 13 | 10 | 10 |
| Villa Nueva UVI | 11 | 13 | 14 | 15 | 14 | 14 | 14 | 14 | 14 | 13 | 10 | 10 |
| Mixco UVI | 11 | 13 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 13 | 11 | 10 |
| Guatemala City UVI | 11 | 13 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 13 | 11 | 10 |
| San Juan Sacatepequez UVI | 11 | 13 | 15 | 15 | 14 | 14 | 15 | 14 | 14 | 13 | 11 | 10 |
| San Jose Chacaya | 11 | 13 | 15 | 16 | 15 | 15 | 15 | 14 | 14 | 14 | 11 | 10 |