Last updated: July 2, 2025
In Gjerstad, Norway, being aware of the UV Index is essential for protecting your skin from harmful sun exposure. Understanding UV levels not only helps prevent painful sunburns but also plays a crucial role in maintaining long-term skin health. With Gjerstad's Cfb climate, which features mild summers, residents and visitors alike face distinct UV exposure risks, especially during peak hours when the index can reach up to 6. Staying informed about these levels empowers you to enjoy the outdoors while safeguarding your skin against potential damage.
At dawn, the UV Index begins its gentle ascent, peaking at 1 by 7:00 AM. As the sun rises higher, the index climbs steadily: reaching 2 at 8:00 AM, it hits 3 by 9:00 AM. The golden hour of 10:00 AM is marked with a 4, and by 11:00 AM, it surges to 5, indicating moderate exposure. The midday sun showcases its strength, with a maximum of 6 between 12:00 PM and 3:00 PM – a clear signal for sun protection! As the afternoon wanes, the index gradually declines, dropping to 3 at 5:00 PM, and finally tapering off to 1 by 7:00 PM, as the sun sets. Remember, during those peak hours, staying protected is essential!
| 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 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | 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 |
| Gjerstad | 1 | 2 | 3 | 4 | 6 | 7 | 7 | 5 | 4 | 2 | 1 | 1 |