Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors of Lostallo, Switzerland, especially given its Dfc climate, characterized by cool summers and snowy winters. Keeping an eye on UV levels can significantly aid in preventing sunburn and maintaining overall skin health, as exposure to high UV radiation can increase the risk of skin damage. With UV Index values peaking at 10 during midday hours, it’s essential for everyone enjoying the beautiful outdoor scenery to stay informed and protect themselves from the sun’s harmful rays. Whether you're taking a leisurely walk or engaging in outdoor activities, being aware of UV exposure risks will help you enjoy the natural splendor of Lostallo safely.
The UV Index data reveals an intriguing pattern over the course of the day. Starting at 07:00 with a mild 1, the sun begins to assert its intensity. By 09:00, the index climbs to 3, signaling that it's time to pay attention to sun safety. The heat intensifies, peaking at 13:00 and 14:00 with a formidable 10, denoting a high risk of harm from unprotected sun exposure. However, as the day progresses, there's a gradual decline; 15:00 sees a 8, settling down to a gentle 3 by 18:00. As evening falls, the UV Index drops to 1 at 19:00, offering a welcome respite. This data illustrates the importance of sun protection during peak hours, particularly 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 | 7 | high | 25 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 6 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index shows significant seasonal variations, indicating changes in the sun's intensity. January and December have the lowest UV levels (2), categorized as low exposure, allowing for longer burn times of up to 45 minutes. However, as we transition into February and March, the index rises to moderate (4) and high (6) categories, respectively, with reduced burn times of 30 and 25 minutes. The most critical months for sun exposure are from April to August, where the UV Index reaches its peak at 10 during June and July, classified as very high exposure with a rapid burn time of just 15 minutes. The UV levels then gradually decrease in September to high (7) and back to moderate levels in October and November. Visitors and residents are advised to take extra precautions during the high-risk months of April to August, by wearing protective clothing, applying sunscreen frequently, and minimizing sun exposure during peak hours.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Basel UVI | 2 | 3 | 5 | 6 | 8 | 9 | 9 | 8 | 6 | 4 | 2 | 1 |
| Bern UVI | 2 | 3 | 5 | 6 | 8 | 9 | 9 | 8 | 6 | 4 | 2 | 2 |
| Zurich UVI | 2 | 3 | 5 | 6 | 8 | 9 | 9 | 8 | 6 | 4 | 3 | 2 |
| Geneve UVI | 2 | 3 | 6 | 7 | 8 | 10 | 9 | 8 | 7 | 5 | 3 | 2 |
| Lausanne UVI | 2 | 4 | 6 | 7 | 8 | 10 | 9 | 9 | 7 | 5 | 3 | 2 |
| Lostallo | 2 | 4 | 6 | 8 | 9 | 10 | 10 | 9 | 7 | 5 | 3 | 2 |