Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors of Caslano, Switzerland, as it plays a pivotal role in safeguarding skin health and preventing sunburn. With its charming climate—classified as Dfc, characterized by mild temperatures and varying UV exposure throughout the day—being aware of the UV levels can help you make informed decisions about outdoor activities. During peak hours, from 11:00 AM to 3:00 PM, the UV Index can reach 9, indicating a very high risk of harm from unprotected sun exposure. By monitoring these levels and taking precautionary measures, you can enjoy the beauty of Caslano while protecting your skin from UV damage.
As the sun rises, the UV Index begins its ascent, starting at a mild 1 at 07:00. By 08:00, it climbs to a 2, indicating a low risk of harm from unprotected sun exposure. However, from 09:00 onwards, the intensity builds, peaking at 9 between 13:00 and 14:00—a time when precautions are essential to protect skin from damage. The afternoon hours see a slight decrease, dropping to 8 at 15:00 and further declining to 4 by 17:00. As the sun sets, the UV Index falls back down to 1 by 19:00, marking a return to safer levels. Stay vigilant during those midday hours to enjoy the sunshine while keeping your skin healthy!
| 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 | 8 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 9 | 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 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index exhibits notable fluctuations, indicating varying levels of sun exposure risk. The winter months of January and December see low UV levels (Index 2), allowing for a burn time of up to 45 minutes. As spring approaches, February rises to a moderate level (Index 3), with a reduced burn time of 30 minutes. The high-risk months commence in March and continue through August, peaking at 9 in June and July; during this period, exposure is categorized as very high and burn times drop to just 15 minutes. Following the mid-summer, September marks a decrease to a high category (Index 7), while October and November revert to moderate levels. As you plan outdoor activities, it is crucial to remain vigilant during the high-risk months (March to August); practice sun safety by seeking shade, wearing protective clothing, and applying sunscreen frequently to minimize UV exposure.
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 |
| Caslano | 2 | 3 | 6 | 6 | 8 | 9 | 9 | 8 | 7 | 5 | 3 | 2 |
| Lausanne UVI | 2 | 4 | 6 | 7 | 8 | 10 | 9 | 9 | 7 | 5 | 3 | 2 |