Last updated: July 2, 2025
In Les Verrières, Switzerland, being aware of the UV Index is crucial for protecting your skin and overall health. Understanding UV levels can help you prevent painful sunburns and reduce the long-term risks associated with UV exposure, such as skin cancer. Nestled in a Cfb climate zone, Les Verrières experiences varied weather patterns, but on sunny days, UV levels can soar, particularly around midday when they peak at a striking 9. With this knowledge, residents and visitors alike can take informed precautions to enjoy the outdoors safely.
The UV index starts slowly, peaking at 1 during the early morning hours of 07:00 and 08:00. As the sun ascends, it climbs steadily, reaching a moderate 3 by 09:00. The intensity escalates sharply to 4 at 10:00, and by 11:00, it soars to 6, signaling a high level of solar radiation. The sun is at its zenith by 12:00, with a UV index of 8, and the risk of harm from unprotected sun exposure is significant. The index peaks at an impressive 9 between 13:00 and 14:00, necessitating precaution for outdoor activities. Gradually, the UV levels begin to taper off, dropping to 8 at 15:00, then 6 at 16:00. As the day winds down, the index falls to 5 at 17:00, then back to 3 by 18:00, and finally settles at a low 1 by 19:00. This pattern emphasizes the importance of sun safety during midday hours while enjoying the great outdoors.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 4 | moderate | 30 min |
| 11:00 | 6 | 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 | 5 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index demonstrates notable seasonal variations that affect exposure risk. January and February have relatively low to moderate UV levels (Index 2-3), with safe burn times of 45 and 30 minutes respectively. As spring approaches, March sees a rise to an index of 5, and by April, it reaches 6, marking the beginning of high-risk months. The most critical period arrives in May and June, where the UV Index peaks at 8-9, indicating very high exposure risk and a reduced burn time of just 15 minutes. July and August maintain this peak, before tapering off in September with a return to a high risk (UV Index 6). October brings a moderate reduction (Index 4), while winter months November and December drop back to low levels. Visitors and residents should be particularly vigilant during May through September, using sunscreen and protective clothing to minimize harmful effects during these high-risk months.
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 |
| Les Verrieres | 2 | 3 | 5 | 6 | 8 | 9 | 9 | 8 | 6 | 4 | 2 | 1 |
| 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 |