Last updated: November 2, 2025
Understanding the UV Index in Saint-Thomas, France, is crucial for protecting your skin from harmful ultraviolet rays. Awareness of UV levels not only helps in preventing painful sunburns but also plays a significant role in maintaining long-term skin health. With a Cfb climate, Saint-Thomas experiences varied UV exposure throughout the day, peaking at a high index of 10 in the early afternoon. Being mindful of these levels ensures that both residents and visitors can enjoy the beautiful sun-kissed days safely.
The UV Index throughout the day showcases a clear rise in intensity, peaking at 10 around 2 PM, demanding attention for sun safety. Starting off gently at a mere 1 at 7 AM and 8 AM, the index steadily escalates, hitting a moderate 4 by 10 AM. As the sun ascends, it reaches 6 at 11 AM and escalates to a striking 9 at 1 PM. The mid-afternoon sun delivers its strongest impact, emphasizing the need for sunscreen and protective gear. As shadows stretch, the UV Index begins to decline, returning to 5 by 5 PM, before tapering off to 2 as the day unwinds. Stay aware and protect your skin during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 0 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 1 | low | 45 min |
| 10:00 | 2 | low | 45 min |
| 11:00 | 2 | low | 45 min |
| 12:00 | 3 | moderate | 30 min |
| 13:00 | 3 | moderate | 30 min |
| 14:00 | 2 | low | 45 min |
| 15:00 | 2 | low | 45 min |
| 16:00 | 1 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, seasonal changes in UV exposure highlight significant fluctuations in the UV Index. The months of May through August are particularly high-risk, with UV Index values reaching a peak of 10, indicating very high exposure and a burn time of only 15 minutes. Visitors and residents should remain vigilant during these months, employing protective measures such as sunscreen and clothing, especially between 10 AM and 4 PM when UV exposure is strongest. March and April also show increased risk with UV Index values of 6 and 7 respectively. Conversely, January and December present lower risk levels, with UV Index values of 2 indicating low exposure and longer potential burn times of 45 minutes. It is essential to monitor UV levels year-round and adjust sun protection strategies accordingly to ensure safety.
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 |
| 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 |
| Saint-Thomas | 2 | 4 | 6 | 7 | 9 | 10 | 10 | 9 | 7 | 5 | 3 | 2 |