Last updated: June 2, 2025
Understanding the UV Index is crucial for residents of Letham, United Kingdom, as it plays a significant role in sunburn prevention and skin health. With a temperate maritime climate (Cfb), Letham experiences varying UV levels throughout the day, peaking at 8 around 1 PM during the summer months. Being aware of these levels empowers you to protect your skin from harmful UV radiation and reduce the risk of long-term health issues. From the early morning hours when the index starts at 1, to midday peaks that can soar to 8, knowing when to seek shade or apply sunscreen is essential for enjoying the beautiful Scottish outdoors safely.
The UV Index climbs steadily through the morning, starting at a mild 1 at 07:00, before rising to a moderate 3 by 09:00. As the sun reaches its zenith, the index peaks at a robust 8 at 13:00, signaling a time when sun protection is essential. From there, it gradually descends, dropping to 5 by 16:00 and down to a comfortable 1 by 19:00. This hourly data underscores the importance of staying sun-safe during peak hours, particularly between 11:00 and 14:00 when the UV levels are at their highest. Remember to apply sunscreen and seek shade during these crucial moments!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 6 | high | 25 min |
| 12:00 | 7 | high | 25 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 7 | high | 25 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV Index levels show significant seasonal variation, with high-risk months typically occurring from May to August. In June, the UV Index peaks at 8, indicating a very high risk of harm from unprotected sun exposure, with a burn time reduced to just 15 minutes. Conversely, from January to February and again in November to December, the UV Index remains low (1-2), allowing for longer exposure times (up to 45 minutes) without significant risk. As such, for residents and visitors, it is strongly advised to take protective measures during the high UV months, particularly from May to July, which includes wearing sunscreen, protective clothing, and limiting sun exposure during peak hours. During the winter months, while the risk is lower, it's still wise to remain cautious as UV rays can still cause skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Letham | 1 | 2 | 3 | 5 | 6 | 8 | 7 | 6 | 5 | 3 | 1 | 1 |
| Liverpool UVI | 1 | 2 | 3 | 5 | 7 | 8 | 8 | 7 | 5 | 3 | 2 | 1 |
| Sheffield UVI | 1 | 2 | 4 | 5 | 7 | 8 | 8 | 7 | 5 | 4 | 2 | 1 |
| Birmingham UVI | 1 | 2 | 4 | 5 | 7 | 8 | 8 | 7 | 6 | 4 | 2 | 1 |
| London UVI | 1 | 2 | 4 | 5 | 7 | 8 | 8 | 7 | 6 | 4 | 2 | 1 |
| Bristol UVI | 1 | 2 | 4 | 5 | 7 | 8 | 8 | 7 | 6 | 4 | 2 | 1 |