Last updated: July 2, 2025
Staying informed about the UV Index is essential for residents of Naives-Rosieres, France, where the Cfb climate brings a mix of sun and clouds, leading to varying UV exposure risks throughout the day. Understanding UV levels is crucial not just for preventing painful sunburns, but also for safeguarding your long-term skin health. During peak sunlight hours—from 12:00 PM to 3:00 PM—UV Index levels can soar to a high of 8, indicating a significant risk of harm from unprotected sun exposure. By keeping an eye on the UV Index, you can make informed decisions about sun protection and enjoy the outdoors safely.
The UV Index throughout the day showcases a dynamic pattern in sunlight intensity, starting with a mild 1 at 07:00 and 08:00. As the sun climbs higher in the sky, it reaches a moderate 3 by 09:00. The real surge begins at 10:00 when the index hits 4, peaking at 12:00 and 13:00 with an impressive 8. This peak lasts through 14:00 and 15:00, reminding us to take precautions under the blazing sun. As the day progresses, the intensity gradually decreases, dipping to 6 at 16:00, and then fading further to 4, 3, and finally 2 by 19:00. It's a clear reminder of the sun's power and the importance of sun protection during 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 | 4 | moderate | 30 min |
| 11:00 | 6 | high | 25 min |
| 12:00 | 8 | very high | 15 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 8 | 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 | 3 | moderate | 30 min |
| 19:00 | 2 | low | 45 min |
Throughout the year, the UV Index experiences significant fluctuations, with high-risk months identified primarily from April to August, where the index peaks at an alarming 9 in June. During these months, the exposure category escalates to very high, resulting in a burn time of just 15 minutes for unprotected skin. In contrast, January, November, and December have low UV levels, making sun protection less critical, with burn times extending to 45 minutes. As such, it’s essential for both visitors and residents to stay vigilant during the peak months by applying broad-spectrum sunscreen, wearing protective clothing, and seeking shade, especially between 10 AM and 4 PM, when UV rays are strongest.
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 |
| Naives-Rosieres | 2 | 3 | 4 | 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 |