Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors of Ushuaia, Argentina, a city nestled at the southern tip of the world. With a subpolar oceanic climate, Ushuaia experiences unique sunlight patterns that can put your skin at risk, especially during the day's peak hours. Recognizing the UV levels is essential for preventing sunburn and maintaining long-term skin health. During typical summer days, UV exposure may be lower than in other regions, but it’s still important to stay informed: even a UV Index of 1 can prompt the need for protective measures. Embrace the beauty of Ushuaia while ensuring your skin remains safe and healthy under its distinctive sun!
The UV Index throughout the day reveals a mostly low exposure risk, with values remaining at 0 before 10:00 AM and after 17:00 PM. Between 10:00 and 16:00, the UV Index peaks at 1, indicating a minimal chance of harm from unprotected sun exposure. This gradual rise emphasizes the importance of sun safety during those midday hours, though the overall low readings suggest it’s a great day for outdoor activities with minimal sun protection concerns, especially in the morning and evening when the UV levels drop back to 0. Enjoy your day under the sun!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 0 | low | 45 min |
| 08:00 | 0 | low | 45 min |
| 09:00 | 0 | low | 45 min |
| 10:00 | 1 | low | 45 min |
| 11:00 | 1 | low | 45 min |
| 12:00 | 1 | low | 45 min |
| 13:00 | 1 | low | 45 min |
| 14:00 | 1 | low | 45 min |
| 15:00 | 1 | low | 45 min |
| 16:00 | 1 | low | 45 min |
| 17:00 | 0 | low | 45 min |
| 18:00 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV Index fluctuates significantly throughout the year, displaying the highest levels during the winter months and late in the year. January and February feature very high UV levels (10 and 8, respectively), with a burn time of only 15 minutes, presenting a high risk for sunburn. Following this, March sees a slight decline to a high category (6), while April and May drop to moderate and low levels (3 and 2, respectively), allowing for longer safe exposure times of 30 and 45 minutes. The summer months (June and July) remain in the low risk category (1), maintaining a burn time of 45 minutes. However, as the year approaches its end, August and September return to moderate levels (3 and 5), before escalating sharply again by November and December, registering extreme UV indexes of 12 and 11 with a burn time reduced to 10 minutes. Visitors and residents should prioritize sun safety during the high-risk months of November and December, as well as January and February, by wearing protective clothing and using sunscreen, while also remaining mindful of the UV levels during spring and summer for balanced sun exposure.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ushuaia | 10 | 8 | 6 | 3 | 2 | 1 | 1 | 3 | 5 | 10 | 12 | 11 |
| 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 |