Last updated: July 2, 2025
In La Rioja, Argentina, awareness of the UV Index is vital for everyone who enjoys the sun-drenched outdoors. Understanding UV levels is essential not only for preventing sunburn but also for safeguarding your long-term skin health. With a semi-arid climate that often exposes residents and visitors to high levels of ultraviolet radiation, it's crucial to stay informed about daily UV fluctuations. From the rising sun to midday peaks, knowing the UV Index helps you take proactive measures against potential skin damage, ensuring you can enjoy all that La Rioja has to offer while staying safe under the sun.
As the sun traced its arc across the sky, the UV Index rose steadily through the morning and peaked in the early afternoon. Starting from a cool 0 at 7:00 and 8:00, it made its way to 1 by 9:00, then ramped up to 3 at 11:00 and reached its maximum of 5 between 13:00 and 14:00, indicating a significant potential for skin damage without protection. As the day wanned, the index began to decline, dropping to 4 at 15:00 and then gradually decreasing to 1 by 17:00. By the evening, at 19:00, the UV Index returned to a safe 0, marking the end of a sun-filled day. Remember, whether you're outside in the peak hours or winding down, always take care to protect your skin!
| 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 | 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 | 3 | moderate | 30 min |
| 17:00 | 1 | 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 March and returning in October and November, where burn times are notably short at 10 minutes. April sees a shift to a very high risk, while May introduces a high category with a more moderate burn time of 25 minutes. From June to July, the Index drops to moderate, extending safe exposure times to 30 minutes, before rising again in August. September experiences another spike in UV levels, moving back to very high. Given these fluctuations, it is crucial for visitors and residents to remain vigilant and take protective measures, especially during the high-risk months of January, February, March, October, and November when sun exposure can lead to harm within minutes. Always wear sunscreen, seek shade during peak hours, and wear protective clothing to mitigate the risks associated with elevated UV levels.
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 |
| La Rioja | 15 | 14 | 12 | 9 | 6 | 5 | 5 | 7 | 9 | 12 | 14 | 15 |
| San Miguel de Tucuman UVI | 15 | 14 | 13 | 10 | 7 | 5 | 6 | 7 | 10 | 13 | 15 | 15 |