Last updated: July 2, 2025
In Troistorrents, Switzerland, staying informed about the UV Index is crucial for protecting your skin and overall health. Understanding UV levels helps prevent sunburn and reduces the risk of long-term skin damage, making it especially important during the peak hours of sunlight. With a climate characterized by varying sun exposure, Troistorrents boasts UV levels that can reach a high of 9 around midday, indicating significant risk for unprotected skin. By keeping an eye on the UV Index, you can enjoy the beautiful alpine scenery while ensuring you take the necessary precautions for a sun-safe experience.
As the day unfolds, the UV Index rises steadily, peaking around 1 PM when it reaches an impressive 9—the highest value of the day. Starting at a gentle 1 at 7 AM, the index remains low until 10 AM, when it climbs to 5. By 11 AM, it ramps up to 7 and continues to soar, hitting 8 at noon. The sun’s intensity is most formidable between 1 PM and 2 PM, inviting caution as outdoor plans peak. As afternoon transitions into evening, the index gradually recedes; by 6 PM, it drops to 3, concluding the day with a soft 1 at 7 PM. Stay protected during the peak hours to enjoy the outdoors safely!
| 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 | 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 | 7 | 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 exhibits significant seasonal variation, reflecting changes in sun exposure levels that can impact skin health. Low-risk months are observed in January, December, and to some extent, November with indexes of 2 to 3, allowing for longer burn times of 30 to 45 minutes. The risk then rises substantially starting in February, peaks during the summer months of May through August with very high ratings between 8 and 10—advising visitors and residents to minimize exposure to just 15 minutes during these months. March and April also present high UV levels, emphasizing the need for protective measures. As fall approaches in September and October, the UV Index decreases but remains moderate, suggesting continued caution. To stay safe, individuals should apply sunscreen, wear protective clothing, and seek shade especially during the high-risk months of May to August.
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 |
| Troistorrents | 2 | 4 | 6 | 7 | 8 | 10 | 9 | 9 | 7 | 5 | 3 | 2 |
| Lausanne UVI | 2 | 4 | 6 | 7 | 8 | 10 | 9 | 9 | 7 | 5 | 3 | 2 |