Last updated: May 3, 2025
Staying informed about the UV Index is crucial for the residents and visitors of Gualeguaychú, Argentina. Understanding UV levels is essential for preventing sunburn and promoting long-term skin health, especially in a city known for its warm, humid Cfa climate. With midday UV Index values peaking at a significant 5, it’s important to take precautions as these levels can lead to increased risks of skin damage. As we navigate the sun-soaked days, being aware of UV exposure not only protects your skin but also enhances your overall outdoor experience in this beautiful region.
The UV Index offers a clear glimpse into the sun's intensity throughout the day. At 7:00 AM, the index starts at a ground zero of 0, making it a safe time for morning activities. As the sun rises, it gradually climbs to 1 by 8:00 AM and 9:00 AM, indicating low UV exposure. However, the real action begins at 10:00 AM, when the index escalates to 3—a point where sun protection starts to become essential. The peak of the day occurs between 12:00 PM and 1:00 PM, reaching a maximum of 5, warning us to take extra precautions. After this high point, the UV exposure decreases, tapering to 4 by 2:00 PM, then down to 3 at 3:00 PM, and finally cooling off to 1 by early evening, landing back at 0 by 7:00 PM. Understanding this hour-by-hour UV trend empowers us to enjoy the sun safely while minimizing the risk of overexposure.
| 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 | 3 | moderate | 30 min |
| 11:00 | 4 | moderate | 30 min |
| 12:00 | 5 | moderate | 30 min |
| 13:00 | 5 | moderate | 30 min |
| 14:00 | 4 | moderate | 30 min |
| 15:00 | 3 | 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 shows significant seasonal changes in sun exposure, with high-risk months occurring from January to April and during October to November. The UV Index peaks at 15 in January and gradually decreases to 4 by July before rising again. Notably, from January to March, the exposure category remains in the extreme range, with a quick burn time of only 10 minutes. In contrast, May and June experience a moderate index, allowing for longer safe exposure times of 30 minutes. Visitors and residents should take extra precautions during high-risk months, including wearing sunscreen, seeking shade, and wearing protective clothing, especially when the index is at its peak.
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 |
| Gualeguaychu | 15 | 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 |