Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Rosans, France, as it directly impacts skin health and sunburn prevention. With its Cfb climate, Rosans experiences varying UV exposure throughout the day, peaking at a significant 10 between 1 PM and 3 PM. Being aware of these levels helps individuals make informed decisions about sun protection, ensuring safe outdoor enjoyment in this picturesque region. By monitoring the UV Index, you can take proactive steps to shield yourself from harmful rays and enjoy the sun responsibly.
At 07:00 AM, the UV Index starts off low at 1, making sun protection unnecessary. However, as the day progresses, the UV intensity begins to climb, reaching 3 by 09:00 AM. The real surge occurs around 11:00 AM, where it escalates to 7, and by 12:00 PM, it peaks at a significant 8. The maximum UV exposure is recorded between 01:00 PM and 02:00 PM, both hitting an impressive 10. Following this zenith, the index gradually decreases, dropping to 9 by 03:00 PM, and tapering down to 5 by 05:00 PM. As the sun sets, the UV Index returns to more manageable levels, falling to 2 by 07:00 PM. To ensure safety during peak hours, it is advisable to apply sunscreen and seek shade from 11:00 AM to 02:00 PM.
| 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 | 7 | high | 25 min |
| 12:00 | 8 | 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 | 5 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 2 | low | 45 min |
Throughout the year, seasonal changes in UV exposure highlight significant fluctuations in the UV Index. The months of May through August are particularly high-risk, with UV Index values reaching a peak of 10, indicating very high exposure and a burn time of only 15 minutes. Visitors and residents should remain vigilant during these months, employing protective measures such as sunscreen and clothing, especially between 10 AM and 4 PM when UV exposure is strongest. March and April also show increased risk with UV Index values of 6 and 7 respectively. Conversely, January and December present lower risk levels, with UV Index values of 2 indicating low exposure and longer potential burn times of 45 minutes. It is essential to monitor UV levels year-round and adjust sun protection strategies accordingly to ensure safety.
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 |
| Rosans | 2 | 4 | 6 | 7 | 9 | 10 | 10 | 9 | 7 | 5 | 3 | 2 |