Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Rueun, Switzerland, where the mountain climate can lead to significant variations in sun exposure. Being aware of UV levels helps prevent harmful sunburn and protects overall skin health, especially during peak hours when the index reaches as high as 10. With its unique climate (characterized by an ET zone), Rueun experiences notable UV exposure risks, making it essential to monitor these levels throughout the day. As the sun climbs to its zenith, so does the need for effective sun protection—let's explore how to stay safe under the Swiss sun!
The UV Index throughout the day showcases a notable increase in intensity, peaking at 12:00 PM, where it reaches a striking 10—indicative of very high sun exposure risk. Beginning from a gentle 1 at 7:00 AM, the index gradually escalates, hitting 3 by 9:00 AM and rapidly climbing to 6 by mid-morning. The sun's strength becomes undeniably potent around 11:00 AM with an 8, before settling into its peak at 12:00 PM and maintaining that level until 2:00 PM. As the day progresses, the intensity begins to wane, dropping to a 7 by 4:00 PM and tapering off to 1 by 7:00 PM, suggesting that while the morning and early afternoon require caution when outdoors, the evening presents a more comfortable atmosphere. Be sure to protect your skin during those high index 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 | 6 | high | 25 min |
| 11:00 | 8 | very high | 15 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 10 | very high | 15 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 |
As the seasons change, so does the UV Index, reflecting fluctuations in UV radiation exposure throughout the year. The highest risk months generally occur from April to August, where the UV Index reaches peak levels of 8 to 10, indicating very high exposure and a burn time as short as 15 minutes. Visitors and residents are strongly advised to take protective measures during these months, such as wearing sunscreen, sunglasses, and protective clothing. In contrast, January and December are safer months with a low UV Index of 2, allowing for longer exposure times of 45 minutes. However, even during moderate months like February, October, and November, UV precautions remain important, as burn times drop to 30 minutes. Staying informed and protecting your skin year-round is essential for health and safety.
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 |
| Rueun | 2 | 4 | 7 | 8 | 9 | 10 | 10 | 9 | 7 | 5 | 3 | 2 |