Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors of Lomas de Vallejos, Argentina, where the climate is classified as Cfa—temperate and humid, yet susceptible to high levels of UV radiation. Awareness of UV levels during the day is essential to prevent sunburn and protect your skin health, especially when UV radiation peaks between 11 AM and 2 PM, reaching levels up to 6. By keeping track of the UV Index, you can enjoy the sunny outdoors while minimizing the risks associated with overexposure to the sun, ensuring a safe and enjoyable experience in this vibrant region.
The UV Index throughout the day presents a clear pattern of increasing intensity, peaking during the midday hours. Starting at 0 at 7:00 AM, the index gradually rises to 6 by 12:00 PM, remaining at this level until 2:00 PM. As the afternoon unfolds, the intensity begins to decline, falling to 4 by 3:00 PM and further decreasing to 1 by 5:00 PM. By 7:00 PM, the UV Index drops back to 0, signaling a safe reprieve from sun exposure. It's a day that encourages outdoor activities, cautioning sunseekers to peak their sun protection efforts around noon.
| 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 | 3 | moderate | 30 min |
| 11:00 | 5 | moderate | 30 min |
| 12:00 | 6 | high | 25 min |
| 13:00 | 6 | high | 25 min |
| 14:00 | 6 | high | 25 min |
| 15:00 | 4 | 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 fluctuations throughout the year, with extreme values observed from January to March, reaching as high as 14, indicating a burn time of just 10 minutes. As temperatures rise, April marks a transition to very high UV levels (10) with a burn time of 15 minutes, followed by a decrease to high levels in both May (6) and July (6), allowing for longer exposure times of 25 minutes. Notably, September sees a return to very high UV levels at 10, while October and November revert to extreme levels of 14, emphasizing the ongoing risk as the year closes out. Visitors and residents should remain vigilant, particularly during the high-risk months of January through March, April, September, October, and November. To minimize the risk of UV-related harm, it is advisable to seek shade, wear protective clothing, and apply sunscreen during peak exposure times, especially in the extreme and very high categories.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| Lomas de Vallejos | 14 | 14 | 13 | 10 | 6 | 5 | 6 | 7 | 10 | 13 | 14 | 14 |
| San Miguel de Tucuman UVI | 15 | 14 | 13 | 10 | 7 | 5 | 6 | 7 | 10 | 13 | 15 | 15 |