Last updated: July 2, 2025
Awareness of the UV Index is crucial for residents and visitors in Rosario de la Frontera, Argentina, especially in a region characterized by its Cwa climate—a blend of wet and dry seasons. Understanding the UV levels is essential for sunburn prevention and maintaining skin health, as exposure can lead to harmful effects, even in brief periods. With peak UV levels reaching 7 around midday, it is vital to take precautions to safeguard your skin from overexposure. Being informed allows you to enjoy the sun safely while minimizing risks associated with prolonged sun exposure in this sunny locale.
The UV Index data for the day unfolds a dynamic story of solar intensity. Starting at a maximum of 0 at 07:00, the index gradually creeps up to 1 by 08:00 and remains at that level until 09:00. As the sun climbs higher, it peaks at a significant 7 during the noon hours of 13:00 and 14:00, indicating a high risk of harm from unprotected sun exposure. The afternoon brings a slight decrease, with the index dropping to 5 by 15:00 and continuing to decline throughout the evening. By 19:00, it settles back to 0, signaling that the sun's strength has diminished. Overall, this hourly snapshot underscores the importance of sun protection during peak hours, especially between 11:00 and 14:00 when the UV Index is at its highest.
| 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 | 4 | moderate | 30 min |
| 12:00 | 6 | high | 25 min |
| 13:00 | 7 | high | 25 min |
| 14:00 | 7 | high | 25 min |
| 15:00 | 5 | moderate | 30 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV Index exhibits significant seasonal variation, with extreme levels persisting from January to April, where it consistently reaches values between 14 and 16, necessitating a burn time of just 10 minutes. As temperatures rise, the index begins to decline, dropping to a very high category in May and August (with indexes of 8) and transitioning to high levels during June and July (indexes of 6 and 7, respectively), allowing for a longer burn time of 25 minutes. However, September and October see a resurgence to extreme levels (indexes of 11 and 14), coupled with a return to a 10-minute burn time. Notably, November and December also maintain extreme UV conditions, reiterating the need for caution with a 10-minute burn time. Visitors and residents are advised to take proactive measures during high-risk months (January through April and September through November) by wearing protective clothing, applying sunscreen frequently, and minimizing direct sun exposure during peak hours to mitigate the risks associated with high 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 |
| 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 |
| Rosario de la Frontera | 16 | 15 | 14 | 11 | 8 | 6 | 7 | 8 | 11 | 14 | 16 | 16 |