Last updated: July 2, 2025
In Mézières-en-Vexin, France, staying informed about the UV Index is essential for maintaining skin health and preventing sunburn. Understanding UV levels can help residents and visitors alike make informed decisions about sun exposure, especially during peak hours when the risk of harmful effects is heightened. With its Cfb climate, Mézières-en-Vexin experiences a range of UV exposure risks throughout the day; for example, UV levels peak at 8 between 1 PM to 3 PM, signaling a pressing need for protective measures. Awareness of these levels not only fosters a healthier lifestyle but also enables the community to fully enjoy outdoor activities all year round while safeguarding against damaging rays.
The UV Index today offers a clear picture of sun intensity throughout the day. Starting off gently, the index gradually rises from 1 at 07:00 and 08:00, reaching a moderate 2 by 09:00. The sun's brilliance peaks at 12:00, hitting a maximum of 7, before escalating to a high of 8 from 13:00 to 15:00. As the afternoon wanes, the index gracefully tapers down, retreating to 5 by 17:00 and further to 3 by 18:00. Finally, the UV levels drop to a gentle 2 by 19:00, signaling a safe time to enjoy evening outings while being mindful of sun exposure 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 | 4 | moderate | 30 min |
| 11:00 | 5 | moderate | 30 min |
| 12:00 | 7 | high | 25 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 8 | 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 experiences significant fluctuations, with high-risk months identified primarily from April to August, where the index peaks at an alarming 9 in June. During these months, the exposure category escalates to very high, resulting in a burn time of just 15 minutes for unprotected skin. In contrast, January, November, and December have low UV levels, making sun protection less critical, with burn times extending to 45 minutes. As such, it’s essential for both visitors and residents to stay vigilant during the peak months by applying broad-spectrum sunscreen, wearing protective clothing, and seeking shade, especially between 10 AM and 4 PM, when UV rays are strongest.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mezieres-en-Vexin | 2 | 3 | 4 | 6 | 8 | 9 | 8 | 8 | 6 | 4 | 2 | 1 |
| 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 |