Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors of Aosta, Italy, nestled in the stunning alpine region, where the combination of altitude and clear skies can lead to surprisingly high UV exposure. Being aware of UV levels not only helps in preventing sunburn but also plays a significant role in maintaining long-term skin health. With Aosta's climate often subject to intense sunlight, particularly during peak hours when the UV Index can soar to levels of 11, it’s essential to take precautions to protect your skin. Stay informed and enjoy the beautiful outdoors safely by checking the UV Index regularly!
The UV Index shows a dramatic rise throughout the morning, starting at a mild 1 at 07:00 and climbing steadily to 3 by 09:00. As the sun reaches its zenith, the index peaks at an intense 11 between 13:00 and 14:00, indicating a very high risk of harm from unprotected sun exposure. After this peak, the index gradually declines; by 16:00, it falls to 7, and eventually eases to 2 by 19:00. Remember to stay protected during peak hours, especially between 11:00 and 14:00, when UV exposure is at its highest!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 9 | very high | 15 min |
| 16:00 | 7 | high | 25 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 2 | low | 45 min |
Seasonal variations in UV exposure highlight significant changes throughout the year. The highest UV Index readings occur from March to August, reaching a peak of 11 in June and July, marking these months as extreme risk periods with a burn time of only 10 minutes. April and May also record very high indices, necessitating caution while outdoors. October follows with a high UV Index of 6, ensuring that UV exposure remains a concern during early fall. Conversely, the winter months (November and December) present a moderate to low risk, with indices dropping to 3 and 2, allowing for longer burn times. Visitors and residents are advised to take protective measures during high-risk months, especially from March to August. This includes wearing sunscreen, protective clothing, and seeking shade during peak sunlight hours to minimize the risk of skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Milan UVI | 2 | 3 | 5 | 6 | 8 | 9 | 9 | 8 | 6 | 5 | 3 | 2 |
| Turin UVI | 2 | 3 | 6 | 7 | 8 | 10 | 9 | 9 | 7 | 5 | 3 | 2 |
| Rome UVI | 3 | 4 | 5 | 7 | 8 | 10 | 10 | 9 | 7 | 5 | 4 | 2 |
| Naples UVI | 3 | 4 | 6 | 7 | 9 | 10 | 10 | 9 | 8 | 6 | 4 | 2 |
| Palermo UVI | 3 | 5 | 6 | 8 | 9 | 10 | 10 | 9 | 8 | 7 | 4 | 3 |
| Aosta | 3 | 5 | 8 | 9 | 10 | 11 | 11 | 10 | 8 | 6 | 3 | 2 |