Last updated: July 2, 2025
In Mar del Tuyu, Argentina, staying aware of the UV Index is crucial for protecting your skin from harmful ultraviolet radiation. Understanding UV levels not only helps in preventing painful sunburns but also plays a vital role in maintaining long-term skin health. Given the region's Cfb climate, which often features sunny days, knowing when UV levels peak—typically between 10 AM and 3 PM—is essential. With UV Index values ranging from 0 to 3 throughout the day, it's important to take proactive measures during those hours to enjoy the sun safely and keep your skin protected.
The UV Index throughout the day reveals a gradual increase in sun intensity, peaking mid-afternoon. Starting at 0 at 07:00, the index rises to 1 by 08:00 and remains moderate at 1 for the following hour. As the sun ascends, the intensity reaches 2 by 10:00, climbing further to 3 at 11:00, sustaining this level until 14:00. After this peak, a gentle decline begins, with the index dropping to 2 at 15:00, and gradually easing back to 1 by 17:00, before retreating to 0 by 18:00. For anyone spending time outdoors, the late morning to early afternoon presents the highest UV exposure; thus, caution and sun protection are highly advisable during these hours.
| 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 | 3 | moderate | 30 min |
| 13:00 | 3 | moderate | 30 min |
| 14:00 | 3 | moderate | 30 min |
| 15:00 | 2 | low | 45 min |
| 16:00 | 1 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV Index experiences significant seasonal fluctuations, with January and December leading as the months with the highest risk, both at UV Index 14 in the extreme exposure category, where you can burn in just 10 minutes. Notably, February and November also pose a high risk with UV Index 12. As spring approaches, March sees a reduction to UV Index 10 (very high), while April drops to UV Index 7 (high), allowing for longer safe exposure times of 25 minutes. The summer months of May, June, and July present moderate risks (UV Index 4 to 3) with burn times extending to 30 minutes. However, this risk rises again in September and October before returning to extreme levels in late fall and winter. Visitors and residents should take precautions, especially during the high-risk months of January, February, October, and November, by wearing protective clothing, applying sunscreen, and seeking shade during peak sun hours to ensure skin safety.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mar del Tuyu | 14 | 12 | 10 | 7 | 4 | 3 | 3 | 5 | 7 | 10 | 12 | 14 |
| 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 |