Last updated: June 2, 2025
In Lully VD, Switzerland, being aware of the UV Index is essential for protecting your health and enjoying the outdoors safely. The UV Index indicates the strength of ultraviolet radiation from the sun, which can lead to sunburn and long-term skin damage if you’re not vigilant. Understanding these levels allows residents and visitors alike to take appropriate precautions, especially during the peak hours around noon when the UV Index can reach as high as 10. With a Cfb climate that features warm summers and moderate UV exposure, the potential risks of sun exposure are significant. Stay informed and protect your skin while embracing the beautiful Swiss sun!
As the sun climbs higher in the sky, the UV Index rises dramatically throughout the day. Beginning at a gentle 1 at 07:00, it ramps up to a moderate 3 by 09:00. The peak unfolds between 12:00 and 14:00, with a maximum of 10, signaling a high risk for unprotected skin. After this peak, the index gradually declines, dropping to 5 by 17:00 and then to a softer 1 by the evening at 19:00. For those enjoying outdoor activities, it's crucial to be mindful of the midday sun's intensity and take appropriate precautions during those peak UV hours!
| 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 | 7 | high | 25 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
The UV Index demonstrates significant seasonal variations, affecting both residents and visitors throughout the year. January and December experience the lowest UV levels, categorized as low, with a burn time of 45 minutes. From February, the UV index starts to rise, entering the moderate exposure category, and peaks during the late spring and summer months—May to August—when it reaches very high levels (8 to 10), resulting in a critical burn time of just 15 minutes. The highest risk months for UV exposure are June and July, where precautions are essential. As the fall months approach, the UV levels decrease, returning to moderate assessments by October through November. To minimize the risk of UV-related health issues, visitors and residents should take savvy precautions during the high-risk months by wearing sunscreen, protective clothing, and seeking shade during peak sun 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 |
| Lully VD | 2 | 3 | 6 | 7 | 8 | 10 | 9 | 8 | 7 | 5 | 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 |