Last updated: August 1, 2025
In the picturesque setting of San Jose Ojetenam, Guatemala, awareness of the UV Index is crucial for residents and visitors alike. Understanding UV levels plays a vital role in preventing sunburn and protecting skin health, especially given the region's climate, classified as Cwb, which leads to varying yet often elevated sun exposure risks. With peak UV readings soaring to 15 between noon and 1 PM, it's essential to be informed and take proactive measures against harmful rays. By staying educated on UV exposure, you can enjoy the beautiful outdoors while keeping your skin safe and healthy.
The UV Index throughout the day showcases a dramatic rise and fall, peaking at an intense 15 at 12:00 PM. Starting from a mild 1 at 07:00 AM, the index steadily climbs, reaching 3 by 08:00 AM and soaring to 11 by 10:00 AM. It continues to escalate, hitting 14 at 11:00 AM, before its zenith at 12:00 PM. In the afternoon, the index gradually declines, dropping to 11 at 2:00 PM, then to 7 at 3:00 PM, and further down to 2 by 5:00 PM. Finally, the day concludes with a return to a safe 0 just before nightfall. This pattern underscores the necessity of sun protection during peak hours, particularly from 10 AM to 2 PM, when the UV exposure is most hazardous.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 6 | 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 | 11 | extreme | 10 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 |
Throughout the year, the UV Index in this region exhibits significant seasonal changes, with high-risk months predominantly from January to October. Notably, from March to June, the UV Index peaks at 15, categorized as extreme, signifying that unprotected skin can burn in as little as 10 minutes. February and March see the highest readings—reaching 13 and 15, respectively—while August and September maintain a high index at 14. As a result, it is crucial for visitors and residents to take adequate precautions during these months, such as wearing sunscreen, protective clothing, and seeking shade, especially during midday hours when UV exposure is most intense. In contrast, while December presents a slightly lower risk with a UV Index of 10, it is still advisable to remain vigilant.
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 Ojetenam | 11 | 13 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 11 | 10 |