Last updated: June 2, 2025
Understanding the UV Index in Sem, Norway is crucial for protecting your skin from harmful ultraviolet radiation. The UV Index provides essential information about the intensity of sun exposure, helping residents and visitors alike take proactive measures against sunburn and long-term skin damage. With Sem's temperate climate, characterized by its Cfb zone, the risk of UV exposure can be unexpectedly high, especially during midday hours when the index peaks at 7. Staying informed about these UV levels not only promotes better skin health but also encourages safer outdoor activities in this beautiful landscape. Remember, knowing when to seek shade can make all the difference in enjoying the sunny days ahead!
The UV Index data reveals a distinct pattern throughout the day, peaking in the early afternoon. Starting at a modest 1 at 07:00, the UV Index gradually climbs, reaching 3 by 09:00. By 11:00, the intensity escalates to 6, and it peaks at 7 from 13:00 to 14:00. As the sun begins to lower, a steady decline occurs, dropping to 4 by 17:00 and retreating back to 1 by 19:00. This highlights the importance of sun protection during the mid-afternoon hours, as the UV levels are significantly higher and pose greater risks. Enjoy the sunshine, but don’t forget to stay safe!
| 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 | 4 | moderate | 30 min |
| 11:00 | 6 | high | 25 min |
| 12:00 | 6 | high | 25 min |
| 13:00 | 7 | high | 25 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 exposure levels fluctuate significantly, with peak intensity occurring during the summer months. January through February feature low UV Index levels (1), allowing for safe outdoor activities with a burn time of 45 minutes. As spring approaches, March to May sees a gradual increase, reaching a moderate level (3-5) where exposure should be limited to 30 minutes to prevent skin damage. The high-risk months of June and July present the highest UV indices (7), necessitating heightened precautions and limiting direct sun exposure to 25 minutes. In late summer and fall, August to September sees a moderate decrease, while October through December return to low levels, similar to the start of the year, with a burn time of 45 minutes. Visitors and residents are advised to wear sunscreen, protective clothing, and seek shade, particularly during the high UV months to ensure skin safety and health.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Trondheim UVI | 1 | 1 | 2 | 4 | 5 | 6 | 6 | 5 | 3 | 2 | 1 | 1 |
| Bergen UVI | 1 | 1 | 3 | 4 | 5 | 7 | 6 | 5 | 4 | 2 | 1 | 1 |
| Oslo UVI | 1 | 2 | 3 | 4 | 5 | 7 | 7 | 5 | 4 | 2 | 1 | 1 |
| Drammen UVI | 1 | 2 | 3 | 4 | 5 | 7 | 7 | 5 | 4 | 2 | 1 | 1 |
| Stavanger UVI | 1 | 1 | 3 | 4 | 6 | 7 | 6 | 5 | 4 | 2 | 1 | 1 |
| Sem | 1 | 1 | 3 | 4 | 5 | 7 | 7 | 5 | 4 | 2 | 1 | 1 |