Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Zernez, Switzerland, where the picturesque, high-altitude climate can lead to heightened sun exposure risks. With UV levels peaking at an impressive 11 during midday hours, awareness of these values plays a vital role in sunburn prevention and maintaining skin health. The tendency for intense sunshine coupled with the region's unique ET climate means that even on seemingly mild days, protective measures are essential. Stay informed about the UV Index to enjoy the stunning landscapes of Zernez safely while safeguarding your skin!
As the sun rises, the UV Index starts its gradual ascent, beginning at a mild 1 at 07:00. By 09:00, it jumps to 4, marking the emergence of stronger rays. The intensity peaks sharply by 12:00, reaching a significant 10, reflecting the sun's full power. By 13:00, it reaches its zenith at 11, urging caution for those outside. The afternoon sees a gradual decline, dropping to 9 at 15:00 and gradually settling back to 1 by 19:00. Overall, today is a reminder to be sun-safe during peak hours, especially between 11:00 and 13:00 when the UV Index is at its highest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 6 | high | 25 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 11 | extreme | 10 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 9 | very high | 15 min |
| 16:00 | 7 | 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 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 |