Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors of Zernez, Switzerland, where the high-altitude climate can significantly amplify sun exposure risks. Awareness of UV levels is essential not only for preventing sunburn but also for safeguarding long-term skin health. With a typical day peaking at a UV Index of 10 around midday, Zernez's stunning alpine scenery may entice you outdoors, but it’s important to be vigilant about UV exposure. As you explore this picturesque locale, keep in mind the importance of monitoring the UV Index to enjoy the sun safely and effectively!
As the sun rises, the UV Index gradually climbs, beginning at a mild 1 at 7:00 AM. By 9:00 AM, it reaches 3, prompting early risers to consider sun protection. The intensity peaks at 1:00 PM with a maximum of 10, signaling the most hazardous conditions for unprotected skin. As the afternoon unfolds, the index dips from 9 at 2:00 PM to 6 by 4:00 PM, offering a brief respite. As the day winds down, the UV rays decrease, falling to 2 by 6:00 PM and returning to a safe 1 by 7:00 PM. Stay mindful of these fluctuations to enjoy the sun while safeguarding your skin!
| 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 | 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 experiences significant variations, which highlight the importance of sun safety for both visitors and residents. High-risk months typically span from March to August, with the peak occurring in June and July, where the UV Index reaches an extreme level of 11 and a quick burn time of just 10 minutes. As temperatures rise, April and May also present very high levels, with indices of 8 and 10 respectively. It is crucial during these months to seek shade, wear protective clothing, and apply high-SPF sunscreen to minimize the risk of skin damage. Conversely, January and December feature a low UV Index of 2, allowing for longer exposure times of up to 45 minutes. Visitors and residents are advised to monitor daily UV levels and adjust their sun protection strategies accordingly, especially during the peak 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 |
| 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 |
| Zernez | 2 | 4 | 7 | 8 | 10 | 11 | 11 | 9 | 7 | 6 | 3 | 2 |