Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors of Las Brenas, Argentina, as it directly impacts skin health and sunburn prevention. With its Cfa climate, this region experiences varying levels of UV exposure throughout the day, peaking between 12 PM and 2 PM with indices of 5 to 6, signaling a heightened risk of skin damage. By staying informed about local UV levels, you can take proactive steps to safeguard your skin from harmful rays and enjoy the sun safely.
The UV Index throughout the day showcases a notable progression in intensity. Starting at 0 by 7:00 AM, the index gradually climbs to 1 by 8:00 AM and remains steady at 1 until 9:00 AM. The sun shines brighter at 10:00 AM, nudging the index to 2, but it’s between 11:00 AM and 2:00 PM that UV levels peak, reaching a striking 6—a clear indication to take sun safety precautions. As the afternoon progresses, the intensity dips from 6 back to 4 at 3:00 PM, and continues to decline, ending the day with a gentle 0 by 7:00 PM. Overall, this UV trend underscores the importance of protecting your skin during the midday hours when the sun is at its strongest.
| 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 | 5 | moderate | 30 min |
| 13:00 | 6 | high | 25 min |
| 14:00 | 6 | high | 25 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, seasonal UV changes present varying risks for sun exposure, with the highest UV Index recorded during the winter months. From January to March, the UV Index remains at an extreme level (15–13) with a critical burn time of just 10 minutes, making this period particularly hazardous for unprotected skin. As the year progresses, April sees a decrease to a very high category (UV Index 10, burn time 15 min), followed by a moderate level in June (UV Index 5, burn time 30 min). However, the risk escalates again in late summer and early fall, with August and September reaching very high levels of UV exposure once more. The final months of the year return to extreme conditions (UV Index 14), emphasizing the importance of sun protection year-round. Visitors and residents should take precautions especially during high-risk months of January to March, October, and November, by wearing sunscreen, protective clothing, and sunglasses, and seeking shade during peak hours to ward off the harmful effects of UV radiation.
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 |
| Las Brenas | 15 | 14 | 13 | 10 | 7 | 5 | 6 | 8 | 10 | 13 | 14 | 14 |
| San Miguel de Tucuman UVI | 15 | 14 | 13 | 10 | 7 | 5 | 6 | 7 | 10 | 13 | 15 | 15 |