Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors of Saint-Julien-en-Born, France. With a climate classified as Cfb, the region experiences a wide range of UV exposure throughout the day, especially during the peak hours from 12 PM to 2 PM, where values can soar to 10—representing a high risk of harm from unprotected sun exposure. Being aware of these levels is vital for effective sunburn prevention and maintaining overall skin health. By keeping an eye on the UV Index, you can take informed steps to protect yourself and enjoy the sunny days along the beautiful southwestern coast.
The UV Index for the day starts off mild, with values of 1 at both 7:00 and 8:00 AM, indicating that sun protection is not yet a priority. As the morning progresses, the index gradually rises, reaching 2 by 9:00 AM and 3 by 10:00 AM. The real intensity kicks in around 11:00 AM, where the UV Index escalates to 5, marking the beginning of elevated sun exposure. By noon, the index spikes to 7, and peaks at 10 by 2:00 PM, signaling a period of high risk for harm from unprotected sun exposure. As the afternoon shifts, values begin to taper off, dropping to 6 by 5:00 PM, then easing to 4 by 6:00 PM, and finally closing the day at 2 by 7:00 PM. It's a clear reminder to stay protected during peak hours!
| 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 | 3 | moderate | 30 min |
| 11:00 | 5 | moderate | 30 min |
| 12:00 | 7 | high | 25 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 9 | very high | 15 min |
| 16:00 | 8 | very high | 15 min |
| 17:00 | 6 | high | 25 min |
| 18:00 | 4 | moderate | 30 min |
| 19:00 | 2 | low | 45 min |
Throughout the year, the UV Index exhibits significant seasonal variations, influencing the risk of sun exposure for both residents and visitors. January and December have a low UV Index of 2, allowing for a burn time of 45 minutes. As the months progress, February and March see a rise to a moderate UV Index of 3 and 5, resulting in 30 minutes of burn time. April marks the transition to a high category with a UV Index of 7, leading to a burn time of 25 minutes. The peak UV months are May, June, and July, where the Index reaches 9 and 10, indicating a very high risk and a burn time of only 15 minutes. While August sees a slight decrease to 9, the risk remains significant. September returns to high at 7, with 25 minutes of burn time, before tapering off to moderate levels in October and November. Visitors are strongly advised to take precautions from April to August, wearing appropriate sun protection, seeking shade, and limiting sun exposure during peak hours to reduce the risk of skin damage.
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 |
| Saint-Julien-en-Born | 2 | 3 | 5 | 7 | 9 | 10 | 10 | 9 | 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 |