Last updated: July 2, 2025
In San Pedro de Atacama, Chile, understanding the UV Index is crucial for maintaining your skin health and preventing sunburn during outdoor activities. With an average UV exposure peaking at 9 around midday, the BWk climate—characterized by its high altitude and arid conditions—significantly amplifies the sun's intensity. Being informed about daily UV levels helps you safeguard your skin while enjoying the stunning landscapes and vibrant culture of this remarkable region. Remember, a little awareness goes a long way in protecting yourself from harmful UV rays!
As the day unfolds, the UV Index paints a dynamic picture of sun exposure. Morning starts off cool, with UV levels at 0 at 07:00 and gradually rising to 1 by 08:00. By 09:00, it ramps up to 2, but the real peak arrives around midday, where UV levels soar to a striking 9 by 12:00 and remain high at 9 until 13:00. The intensity begins to soften in the afternoon, dropping to 8 by 14:00, and further diminishing to 5 at 15:00. As the sun begins to set, the UV Index retreats, landing back at 3 by 16:00 and descending to 1 by 17:00 and 18:00, before finally resting at 0 by 19:00. Be sure to take precautions during peak hours and enjoy the safe glow of the evening!
| 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 | 5 | moderate | 30 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 5 | moderate | 30 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV Index shows considerable variability throughout the year, with the highest values occurring from January to April, where it consistently reaches extreme levels above 16, resulting in a burn time of just 10 minutes. December and November also show extreme values, indicating that this period represents the highest risk for UV exposure. In May through July, the UV Index remains very high, ranging from 8 to 10, allowing for slightly longer burn times of 15 minutes. As we move into August and September, the UV Index peaks back to extreme levels, emphasizing the need for careful sun protection measures. Residents and visitors are advised to take precautions during these high-risk months by applying sunscreen regularly, wearing protective clothing, and seeking shade when possible, especially from October to April, where extreme UV exposure is prevalent.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Santiago UVI | 14 | 12 | 11 | 7 | 5 | 3 | 4 | 6 | 8 | 11 | 12 | 14 |
| Valparaiso UVI | 14 | 12 | 11 | 8 | 5 | 4 | 4 | 6 | 8 | 11 | 12 | 14 |
| Vina del Mar UVI | 14 | 12 | 11 | 8 | 5 | 4 | 4 | 6 | 8 | 11 | 12 | 14 |
| Puente Alto UVI | 15 | 14 | 12 | 8 | 6 | 4 | 6 | 8 | 11 | 12 | 14 | 15 |
| Antofagasta UVI | 15 | 15 | 13 | 10 | 8 | 6 | 7 | 9 | 11 | 14 | 15 | 15 |
| San Pedro de Atacama | 18 | 17 | 16 | 13 | 10 | 8 | 9 | 11 | 14 | 17 | 18 | 18 |