Last updated: July 2, 2025
Understanding the UV Index in Callac, France is crucial for safeguarding your skin and overall health. The UV Index indicates the strength of ultraviolet radiation from the sun, which can lead to painful sunburns and long-term skin damage if proper precautions aren't taken. With Callac's Cfb climate, residents face varying UV levels throughout the day, particularly peaking during midday hours, when values soar to 9. Being aware of the UV Index empowers you to make informed decisions about sun protection, allowing you to enjoy the beautiful outdoors while keeping your skin healthy and safe.
The UV Index on this sunny day starts off modestly, peaking at 1 between 07:00 and 09:00, indicating minimal risk for harm from unprotected sun exposure. As the day progresses, we see a noticeable climb: by 10:00, the index reaches 3, and by noon, it escalates to a significant 7. The highest point occurs at 14:00, with a peak of 9, highlighting a high risk of harm from unprotected sun exposure during these hours. As the afternoon transitions to evening, the index gradually declines to 2 by 19:00, suggesting a safer window for outdoor activities. It’s a clear reminder to stay protected, especially during the peak hours of 12:00 to 15:00 when the sun’s intensity is at its strongest!
| 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 | 8 | 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 | 6 | high | 25 min |
| 18:00 | 4 | moderate | 30 min |
| 19:00 | 2 | low | 45 min |
Throughout the year, UV radiation levels fluctuate significantly, with distinct high-risk months emerging in the summer. From May to August, the UV Index is categorized as very high (ranging from 8 to 9), indicating that visitors and residents should exercise heightened caution, as the burn time decreases to just 15 minutes. April sees a transition to a high exposure category, while March starts in a moderate range. Conversely, the winter months, including January, November, and December, have a low UV Index (2), granting longer burn times of 45 minutes. To safeguard against skin damage, it's imperative for everyone to wear protective clothing, seek shade, and apply sunscreen during peak UV times, especially from late spring to the end of summer.
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 |
| Callac | 2 | 3 | 5 | 6 | 8 | 9 | 9 | 8 | 6 | 5 | 2 | 2 |
| 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 |