Last updated: July 2, 2025
In the picturesque town of Arbois, France, being aware of the UV Index is vital for maintaining skin health and preventing sunburn. Understanding the daily UV levels can help residents and visitors alike make informed decisions about sun exposure, especially during the warmer months when UV rays are strongest. With its oceanic climate, Arbois experiences a range of UV exposure risks, peaking at 9 around midday. By staying informed about the UV Index, you can protect your skin while enjoying the beautiful outdoors that this charming region has to offer.
The UV index starts slowly, peaking at 1 during the early morning hours of 07:00 and 08:00. As the sun ascends, it climbs steadily, reaching a moderate 3 by 09:00. The intensity escalates sharply to 4 at 10:00, and by 11:00, it soars to 6, signaling a high level of solar radiation. The sun is at its zenith by 12:00, with a UV index of 8, and the risk of harm from unprotected sun exposure is significant. The index peaks at an impressive 9 between 13:00 and 14:00, necessitating precaution for outdoor activities. Gradually, the UV levels begin to taper off, dropping to 8 at 15:00, then 6 at 16:00. As the day winds down, the index falls to 5 at 17:00, then back to 3 by 18:00, and finally settles at a low 1 by 19:00. This pattern emphasizes the importance of sun safety during midday hours while enjoying the great outdoors.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 3 | moderate | 30 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 | 6 | high | 25 min |
| 17:00 | 5 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index demonstrates notable seasonal variations that affect exposure risk. January and February have relatively low to moderate UV levels (Index 2-3), with safe burn times of 45 and 30 minutes respectively. As spring approaches, March sees a rise to an index of 5, and by April, it reaches 6, marking the beginning of high-risk months. The most critical period arrives in May and June, where the UV Index peaks at 8-9, indicating very high exposure risk and a reduced burn time of just 15 minutes. July and August maintain this peak, before tapering off in September with a return to a high risk (UV Index 6). October brings a moderate reduction (Index 4), while winter months November and December drop back to low levels. Visitors and residents should be particularly vigilant during May through September, using sunscreen and protective clothing to minimize harmful effects during these high-risk months.
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 |
| Arbois | 2 | 3 | 5 | 6 | 8 | 9 | 9 | 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 |