Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Ås, Norway, especially during the sunnier months when UV levels can peak. This index not only helps in sunburn prevention but is also vital for maintaining long-term skin health. With Ås's Dfc climate, characterized by cool summers, it’s easy to overlook the potential for high UV exposure, particularly during midday when values can reach 6. By staying informed about UV levels, you can enjoy the outdoors safely while protecting your skin from harmful effects.
Starting early in the morning, the UV Index gradually climbs, reaching a peak of 6 at noon and maintaining that level until 2 PM. By 7 AM, it’s a mild 1, but as the sun rises higher, the intensity escalates to 5 by 11 AM. The highest point occurs at 12 PM, where caution is advised for outdoor activities. As the afternoon progresses, the index slightly dips to 5 at 3 PM, before gradually falling back to 2 by 7 PM. This pattern suggests that planning outdoor ventures during the midday hours warrants protective measures, while later hours are more forgiving for fun in the sun.
| 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 | 2 | low | 45 min |
Throughout the year, UV levels exhibit notable seasonal changes that are crucial for both visitors and residents to understand. During the winter months (January to February), the UV Index remains low at 1, with a safe burn time of 45 minutes. As spring approaches, March and April see a moderate increase to an index of 3 and 4 respectively, with reduced burn times of 30 minutes. The high-risk months are May through July, when the UV Index peaks at 6, indicating a high exposure category and a burn time of only 25 minutes. As summer transitions to fall, the UV levels gradually decline, with August to September returning to moderate levels before dropping to low at October to December. Visitors and residents should take precautionary measures, especially during the high UV months, such as applying sunscreen, wearing protective clothing, and seeking shade during peak hours 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 |
| Aas | 1 | 1 | 3 | 4 | 6 | 6 | 6 | 5 | 4 | 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 |