Last updated: July 2, 2025
In Bo, Norway, being aware of the UV Index is crucial for safeguarding your skin health, especially as the seasons shift and outdoor activities increase. Understanding UV levels helps in effectively preventing sunburns and reducing the long-term risks of skin damage. With a Dfc climate, residents can expect varying UV exposure, peaking at a moderate 6 during the midday hours. This makes it essential to check the UV Index regularly and adopt protective measures, particularly on days with higher indices, to enjoy the outdoors safely and confidently.
As the sun rose at 07:00, the UV Index began its leisurely climb, starting at a gentle 1. By 08:00, it picked up pace, reaching 2, and continued to soar throughout the morning. At 09:00, the index hit 3, but it was between 10:00 and 12:00 that it truly peaked, reaching a notable 6. This level sustained itself through 13:00 to 15:00, offering a potent reminder of the sun's strength at midday. As the afternoon waned, the UV Index gracefully descended, dropping to 5 by 16:00 and further to 4 by 17:00. The evening brought relief, with readings of 2 at 18:00 and 19:00, marking the end of a vibrant day under the sun. Remember to stay protected when the UV Index is at its highest!
| 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 | 6 | high | 25 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 2 | low | 45 min |
The UV Index exhibits significant seasonal variation, with the highest levels occurring during the summer months. From May to July, the UV Index peaks at 6 to 7, classified as high, which corresponds to a burn time of just 25 minutes for unprotected skin. March to April sees moderate indices of 3 to 4, necessitating caution, while from August to October, the levels decrease back to moderate and low categories. Notably, the highest-risk months for UV exposure are May, June, and July, making it essential for visitors and residents to take specific precautions, such as wearing sunscreen, protective clothing, and seeking shade during peak sun hours. From November through February, UV exposure is minimal, allowing for a more relaxed approach to sun safety. However, it's advisable to remain vigilant year-round as UV radiation can still pose risks, even on cloudy days.
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 |
| Bo | 1 | 2 | 3 | 4 | 6 | 7 | 7 | 5 | 4 | 2 | 1 | 1 |