Last updated: May 3, 2025
Understanding the UV Index is essential for residents and visitors of Graneros, Chile, where the picturesque climate can sometimes lead to underestimating sun exposure risks. With peak UV levels reaching 5 during midday, it’s vital to be aware of the potential for sunburn and longer-term skin health implications. The moderate climate of Graneros combined with its elevation means that UV radiation can be surprisingly intense, especially from late morning to early afternoon. By staying informed about UV Index levels, you can enjoy the outdoors safely while protecting your skin and overall health.
The UV Index data reveals a dynamic progression throughout the day. Starting at 0 at 7:00 AM, the intensity begins to rise slowly, reaching 1 by 8:00 AM and 9:00 AM. By 10:00 AM, it escalates to 3, indicating a moderate level of UV exposure. 11:00 AM sees the index peak at 4, and the sun reaches its zenith by noon with a UV Index of 5, marking a high risk level. The afternoon maintains this peak at 5 until 1:00 PM, before gradually declining to 4 at 2:00 PM and further down to 3 by 3:00 PM. As the sun sets, the UV radiation drops sharply, returning to 1 at 4:00 PM and 5:00 PM, and finally back to 0 from 6:00 PM onward. Awareness of these fluctuations can guide outdoor plans, ensuring protection during the peak UV hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 0 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 1 | low | 45 min |
| 10:00 | 3 | moderate | 30 min |
| 11:00 | 4 | moderate | 30 min |
| 12:00 | 5 | moderate | 30 min |
| 13:00 | 5 | moderate | 30 min |
| 14:00 | 4 | moderate | 30 min |
| 15:00 | 3 | moderate | 30 min |
| 16:00 | 1 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV index exhibits significant seasonal variation, with extreme levels persisting from January to March and returning in October to November, highlighting these months as high-risk periods for skin damage, with a rapid burn time of just 10 minutes. The spring month of April marks a transition to a very high category with a slightly increased burn time of 15 minutes before tapering to moderate levels in May through July, where individuals can safely enjoy up to 30 minutes of sun exposure. However, by August, UV levels rise to high, necessitating 25 minutes of careful exposure. In September, the risk escalates again to very high before returning to extreme levels by late autumn. Residents and visitors should take precautions during high-risk months by applying sunscreen, wearing protective clothing, and seeking shade during peak sun hours to minimize UV-related health risks.
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 |
| Graneros | 14 | 13 | 11 | 8 | 5 | 3 | 4 | 6 | 8 | 11 | 13 | 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 |