Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors of Saint-Nazaire-en-Royans, France, where the Cfb climate brings both beautiful sunny days and potential sun exposure risks. By keeping an eye on UV levels, you can effectively protect yourself from sunburn and promote long-term skin health. With peak UV levels reaching as high as 9 around midday, awareness of the UV Index is more than just a precaution—it's essential for enjoying the outdoors safely. Whether you're strolling through the picturesque landscapes or engaging in outdoor activities, knowing the UV Index will help you make informed decisions to safeguard your skin while reveling in the region's natural beauty.
This hour-by-hour UV Index data paints a clear picture of sun intensity throughout the day. At 07:00 and 08:00, the UV Index remains low at just 1, making it safe for outdoor activities. However, as the clock ticks toward mid-morning, the value climbs to 2 by 09:00. The sun's power peaks between 12:00 and 14:00, with a striking 8 and 9 respectively, indicating a high risk of harm from unprotected sun exposure. By 15:00, the index begins to decrease, dipping to 8, and continues its descent through the late afternoon and evening, reaching 5 at 17:00 and down to 2 by 19:00. Remember, during those mid-day hours, proper sun protection is essential to enjoy the outdoors safely!
| 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 | 8 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 8 | 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, 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 |
| Saint-Nazaire-en-Royans | 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 |