Last updated: July 2, 2025
Understanding the UV Index is crucial for the residents of Las Heras, Argentina, where the semi-arid BWk climate can lead to significant UV exposure. With peak UV levels reaching as high as 5 in the early afternoon, awareness of these readings can play a vital role in preventing sunburn and protecting skin health. By monitoring UV levels, locals can make informed decisions about outdoor activities and sun protection strategies, ensuring they enjoy the beautiful Argentine sun safely.
The UV Index data reveals an intriguing fluctuation throughout the day. Early morning hours from 07:00 to 09:00 see the UV Index lingering at a comfortable 0-1, indicating minimal risk. As the day progresses, a gentle rise occurs, peaking at 12:00 and 13:00, where the index reaches a moderate 4-5—a reminder to seek shade and wear protection. The afternoon sun then begins to mellow, as the UV levels dip back to 3 by 16:00 and continue to ease into the evening, eventually returning to 0 by 19:00. This data highlights the importance of staying vigilant during peak hours, especially between 11:00 and 15:00 when protection is most crucial.
| 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 | 4 | moderate | 30 min |
| 13:00 | 4 | moderate | 30 min |
| 14:00 | 5 | moderate | 30 min |
| 15:00 | 4 | 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 |
During the year, the UV Index experiences significant fluctuations, peaking in the winter months of January, February, and December with an extreme index of 15, indicating a rapid potential for skin damage with a burn time of just 10 minutes. The transition to spring brings a gradual decline, with March maintaining an extreme rating of 12 before dropping to 8 in April, categorized as very high. As summer approaches, the risk decreases slightly, with June and July recorded at 4 and 5, respectively, both considered moderate, allowing for longer exposure times of 30 minutes. However, caution is advised during August and September when the index rises again to 6 and 9, respectively, with high and very high ratings. The season closes with another spike in UV levels in October and November, returning to an extreme category. Residents and visitors should remain vigilant, especially from January to March and again in October to November, taking necessary precautions such as wearing sunscreen, protective clothing, and limiting sun exposure during peak hours to mitigate the risk of UV-related health issues.
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 |
| Las Heras | 15 | 14 | 12 | 8 | 6 | 4 | 5 | 6 | 9 | 12 | 14 | 15 |
| 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 |