Last updated: May 3, 2025
In Union, Argentina, being aware of the UV Index is crucial for safeguarding your skin's health and preventing sunburn. Understanding UV levels not only helps you plan outdoor activities but also arms you with the knowledge needed to protect yourself from the harmful effects of excessive sun exposure. With a Cfa climate characterized by warm summers and potential UV exposure risks peaking around midday, it's essential to stay vigilant. During the height of the day, especially between 11:00 AM and 2:00 PM, UV levels can reach a moderate to high index of 3 to 5, underscoring the importance of sun protection strategies in maintaining long-term skin health.
The UV Index begins the day at a minimum of 0 at 07:00, indicating a safe environment for outdoor activities. As the sun rises, the index slowly climbs, reaching 1 by 08:00 and then stabilizing at 1 through 09:00. The sun gains strength as it approaches noon, peaking at 4 at 12:00 and maintaining a high of 5 between 13:00 and 14:00—perfect for sun-seekers to enjoy outdoor fun. However, by the late afternoon, protection becomes crucial as the index dips to 4 at 15:00 and steadily declines to 1 by 17:00. Finally, the sun sets, bringing the UV Index back to 0 by 19:00, marking a safe conclusion to the day’s sun exposure. Always be mindful of the UV levels to stay safe and enjoy the beautiful outdoors!
| 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 | 2 | low | 45 min |
| 11:00 | 3 | moderate | 30 min |
| 12:00 | 4 | moderate | 30 min |
| 13:00 | 5 | moderate | 30 min |
| 14:00 | 5 | moderate | 30 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 |
Throughout the year, UV exposure levels exhibit significant seasonal fluctuations. January, February, March, October, November, and December are characterized by an extreme UV Index, reaching as high as 14, with a minimal burn time of just 10 minutes—making these months particularly high-risk for skin damage. In contrast, April sees a high UV Index of 7 (burn time of 25 minutes), which transitions into a moderate level in May, June, and July (UV Index between 3 and 5) with a burn time of 30 minutes. August returns to a high UV level of 6 (25 minutes burn time), while September presents a very high risk with a UV Index of 8 and a shortened burn time of 15 minutes. Visitors and residents are advised to exercise caution and seek shade, wear protective clothing, and apply sunscreen during the high-risk months, particularly from October to March, to minimize harmful UV exposure.
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 |
| Union | 14 | 13 | 11 | 7 | 5 | 3 | 4 | 6 | 8 | 11 | 14 | 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 |