Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors of Cognat-Lyonne, France, where sun exposure can vary significantly throughout the day. With peak UV levels reaching 8 during midday, being aware of these fluctuations helps protect against sunburn and promotes healthier skin. This Cfb climate zone is characterized by mild summers and cool winters, but the risk of harmful UV radiation even on seemingly overcast days remains. By keeping an eye on the UV Index, you can make informed decisions about sun protection and enjoy your time outdoors safely!
As the sun rises, the UV Index starts low at 1 by 7:00 AM, gently climbing to 2 by 9:00 AM. However, it quickly escalates, peaking at 8 from 1:00 PM to 2:00 PM, indicating a notable risk for skin damage. The intensity of UV radiation gradually tapers off in the afternoon, dropping to 6 by 4:00 PM, before further declining to 1 by 7:00 PM. This pattern highlights the importance of protecting yourself during midday hours, especially between 11:00 AM and 2:00 PM when the index reaches its highest level of 7 and 8. Stay safe and enjoy the sun responsibly!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 4 | moderate | 30 min |
| 11:00 | 6 | high | 25 min |
| 12:00 | 7 | high | 25 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 6 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index exhibits significant seasonal changes that impact sun exposure safety. The UV Index is at its lowest in January and December (2), indicating low risk for sunburn with a burn time of 45 minutes. As spring unfolds, March and April see a rise to moderate (UV Index 5) and high (UV Index 7) levels, respectively, with burn times decreasing to 30 and 25 minutes. The summer months, particularly May to August, present the highest risks, reaching a maximum of UV Index 10 in June, where just 15 minutes of exposure can lead to burns. July and August maintain very high levels (UV Index 9). As the year transitions into autumn, September sees a drop to high risk (UV Index 7) with a burn time of 25 minutes, while October and November return to moderate levels. Visitors and residents are strongly advised to take protective measures during high-risk months, especially from April to August, by wearing sunscreen, protective clothing, and seeking shade to minimize the risk of harmful UV exposure.
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 |
| Cognat-Lyonne | 2 | 3 | 5 | 7 | 8 | 10 | 9 | 9 | 7 | 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 |