Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors of Sierra Grande, Argentina, as it plays a vital role in promoting skin health and preventing sunburn. With the region's semi-arid climate (BSk), Sierra Grande offers plenty of sunshine, but this also means elevated risks of harmful UV exposure, especially during midday hours. By being aware of daily UV levels, you can protect yourself and your loved ones from the damaging effects of the sun, ensuring that outdoor activities are not only enjoyable but also safe. Stay informed and take proactive measures to safeguard your skin against the sun!
At dawn, the UV Index starts the day at a refreshingly low 0 until 9:00 AM, making it a perfect time for morning strolls without sun concerns. As the clock ticks to 10:00 AM, it creeps up to 1, signaling the sun's gradual strength. By 11:00 AM, the index rises to 2, prompting some caution for those spending time outdoors. The sun reaches its peak intensity at 12:00 PM with a UV Index of 3, and it continues to climb to a maximum of 4 at 1:00 PM—ideal for applying sunscreen! The index then slightly dips to 3 by 2:00 PM and remains steady through 3:00 PM, before tapering off in the late afternoon. By 6:00 PM, it dwindles to 1, finally retreating back to 0 by 7:00 PM, marking the day's end for UV exposure. Be sure to take precautions during those midday hours when the sun is most potent!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 0 | low | 45 min |
| 08:00 | 0 | low | 45 min |
| 09:00 | 1 | low | 45 min |
| 10:00 | 1 | low | 45 min |
| 11:00 | 2 | low | 45 min |
| 12:00 | 3 | moderate | 30 min |
| 13:00 | 4 | moderate | 30 min |
| 14:00 | 3 | moderate | 30 min |
| 15:00 | 3 | moderate | 30 min |
| 16:00 | 2 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV Index experiences significant seasonal fluctuations, with the highest values occurring during the winter months. January and December record extreme UV levels of 13, necessitating an average burn time of just 10 minutes. February follows closely with a UV Index of 12. Spring begins to see a slight decline, with March at 9 (very high) and April at 6 (high), though caution is still advised. As we move into summer, the UV Index lowers to 4 in May and August (moderate), and 2 in June (low), which are relatively safer months. However, July remains moderate at 3. As fall approaches, UV levels increase again, with September at 6 and October reverting to 9 (very high). November returns to extreme UV exposure at 12. Given this data, it is crucial that visitors and residents remain vigilant, especially during high-risk months (January, February, November, and December), and take protective measures such as wearing sunscreen and protective clothing when the UV Index is high, particularly during those extreme months.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sierra Grande | 13 | 12 | 9 | 6 | 4 | 2 | 3 | 4 | 6 | 9 | 12 | 13 |
| Buenos Aires UVI | 14 | 13 | 11 | 7 | 5 | 4 | 4 | 6 | 8 | 10 | 13 | 14 |
| Rosario UVI | 14 | 13 | 11 | 8 | 5 | 4 | 4 | 6 | 8 | 11 | 13 | 14 |
| Mendoza UVI | 15 | 14 | 12 | 8 | 6 | 4 | 5 | 6 | 9 | 12 | 14 | 15 |
| Cordoba UVI | 15 | 13 | 12 | 9 | 6 | 4 | 5 | 7 | 9 | 12 | 14 | 15 |
| San Miguel de Tucuman UVI | 15 | 14 | 13 | 10 | 7 | 5 | 6 | 7 | 10 | 13 | 15 | 15 |