Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors of Rjukan, Norway, where even moderate sun exposure can lead to skin issues if not managed properly. With a subarctic climate characterized by long, cold winters and brief summers, the UV levels can spike unexpectedly during warmer months, reaching a maximum of 6 during peak hours. Awareness of UV levels helps in preventing sunburn and maintaining skin health, enabling you to enjoy the beautiful outdoor activities that Rjukan has to offer while staying protected. Whether you’re hiking in the picturesque mountains or simply enjoying the sunshine, knowing when to take precautions is essential for a fun and safe experience.
The UV Index throughout the day presents a clear peak in intensity, rising steadily from a gentle 1 at 07:00 to an assertive maximum of 6 between 12:00 and 14:00. This midday surge emphasizes the importance of sun protection, as the index then gracefully descends back to 1 by 19:00. From 08:00 to 11:00, values increase moderately, showcasing an inviting morning glow, while midday hours certainly warrant caution as the sun reaches its zenith. After 15:00, a gradual decline signals a retreat of UV intensity, allowing a more relaxed late afternoon. Armed with this timely information, outdoor enthusiasts can plan their activities with sun safety in mind!
| 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 | 5 | moderate | 30 min |
| 12:00 | 6 | high | 25 min |
| 13:00 | 6 | high | 25 min |
| 14:00 | 6 | high | 25 min |
| 15:00 | 5 | moderate | 30 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, seasonal UV Index changes indicate varying levels of sun exposure risk. In the low-risk months of January, February, October, November, and December, the UV Index remains between 1 and 2, allowing for a safer burn time of 45 minutes. As spring approaches, March sees a moderate UV Index of 3, reducing safe exposure to 30 minutes. The high-risk months of May through August, with UV Index values between 6 and 7, demand more caution as burn times drop to 25 minutes. September transitions back to moderate levels, while the cycle returns to low risk by October. Visitors and residents are advised to monitor UV Index changes, especially during high-risk months, by applying sunscreen, wearing protective clothing, and seeking shade to minimize skin damage.
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 |
| Rjukan | 1 | 2 | 3 | 5 | 6 | 7 | 7 | 6 | 4 | 2 | 1 | 1 |