Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors of Sierra Grande, Argentina, where the BSk climate brings a unique set of sun exposure challenges. The UV levels can vary significantly throughout the day, peaking during midday hours, making awareness essential for sunburn prevention and overall skin health. With typical UV levels reaching 2 between 12:00 PM and 3:00 PM, even a short period under the sun can increase your risk of skin damage. By staying informed about the UV Index, you can enjoy the beautiful outdoor landscapes of Sierra Grande while safeguarding your skin from harmful effects.
Throughout the day, the UV Index exhibits a gradual rise, reaching its peak at 2 between 12:00 PM and 3:00 PM. The morning starts off very mild, with readings of 0 from 7:00 AM to 8:00 AM, barely registering any UV exposure. As the day progresses, the index climbs to 1 at 9:00 AM, maintaining this low level until noon. From 12:00 PM to 3:00 PM, the UV level stabilizes at 2, indicating a moderate risk of harm from unprotected sun exposure. After this peak, the index begins to decline, returning to 1 by 4:00 PM and eventually falling back to 0 from 6:00 PM onwards. For those enjoying the outdoors, it’s vital to stay protected during the midday hours when UV exposure is highest!
| 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 | 1 | low | 45 min |
| 11:00 | 1 | low | 45 min |
| 12:00 | 2 | low | 45 min |
| 13:00 | 2 | low | 45 min |
| 14:00 | 2 | low | 45 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 the highest values occurring during the winter months. January and December record extreme UV levels of 13, necessitating an average burn time of just 10 minutes. February follows closely with a UV Index of 12. Spring begins to see a slight decline, with March at 9 (very high) and April at 6 (high), though caution is still advised. As we move into summer, the UV Index lowers to 4 in May and August (moderate), and 2 in June (low), which are relatively safer months. However, July remains moderate at 3. As fall approaches, UV levels increase again, with September at 6 and October reverting to 9 (very high). November returns to extreme UV exposure at 12. Given this data, it is crucial that visitors and residents remain vigilant, especially during high-risk months (January, February, November, and December), and take protective measures such as wearing sunscreen and protective clothing when the UV Index is high, particularly during those extreme months.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sierra Grande | 13 | 12 | 9 | 6 | 4 | 2 | 3 | 4 | 6 | 9 | 12 | 13 |
| 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 |