Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors in Mont-de-Lans, France, especially given the region's Cfc climate which can lead to significant sun exposure during the warmer months. Awareness of UV levels not only helps prevent painful sunburns but also plays a vital role in maintaining long-term skin health. With peak UV Index values reaching a high of 10 between 1 PM and 3 PM, it’s essential to stay informed and take protective measures against harmful rays. As you enjoy the stunning alpine scenery, staying vigilant about UV exposure will help you make the most of your time outdoors while safeguarding your well-being.
The UV Index chart reveals a dynamic daily pattern of solar intensity. Starting early in the day, the UV Index remains low, peaking at 1 by 08:00. However, as the sun reaches its zenith, the index surges dramatically—hitting 7 by 11:00 and soaring to a maximum of 10 between 13:00 and 14:00. This signals a critical window for sun exposure, where protection is essential. As the afternoon progresses, the UV levels begin to decline, dropping to 4 by 17:00, before tapering off to 1 again by evening. To stay safe, it's vital to be cautious during those peak hours!
| 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 | 9 | 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 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV Index levels fluctuate significantly, with high-risk months primarily from March to October. Starting in March, the UV Index escalates to 7 (high) and peaks in June at 11 (extreme), indicating the need for heightened caution. April and May also present very high levels (9 and 10, respectively), while July through September remain in the very high category, with UV Index values ranging from 8 to 10. As a warning, individuals should pay close attention to their exposure during these months and minimize time spent in direct sunlight, especially during peak hours. It is essential for both residents and visitors to protect their skin by applying sunscreen, wearing protective clothing, and seeking shade whenever possible, particularly between April and September when burn times decrease to as little as 10 to 15 minutes. As the year progresses into November and December, UV levels decrease to moderate and low, allowing for safer outdoor activities.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Paris UVI | 2 | 3 | 5 | 6 | 8 | 9 | 8 | 8 | 6 | 4 | 2 | 1 |
| Lyon UVI | 2 | 3 | 5 | 6 | 8 | 10 | 9 | 8 | 6 | 5 | 3 | 2 |
| Nice UVI | 2 | 4 | 6 | 7 | 8 | 10 | 9 | 8 | 7 | 5 | 3 | 2 |
| Marseille UVI | 2 | 4 | 5 | 7 | 9 | 10 | 9 | 8 | 7 | 5 | 3 | 2 |
| Toulouse UVI | 2 | 4 | 6 | 7 | 9 | 10 | 10 | 9 | 7 | 5 | 3 | 2 |
| Mont-de-Lans | 3 | 5 | 7 | 9 | 10 | 11 | 10 | 9 | 8 | 6 | 3 | 2 |