Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Viken, Sweden, especially as the region experiences varying sun exposure throughout the day. With the potential for skin damage from even low UV levels, being aware of these fluctuating ratings helps you take proactive measures against sunburn and maintain overall skin health. In Viken’s Dfc climate zone, where cool summers can still present significant UV risks, knowing when the sun’s rays are strongest—typically peaking around midday—can make all the difference in enjoying the outdoors safely. Stay informed and protect your skin while soaking up the beautiful Swedish summer!
As the day unfolds, the UV Index climbs steadily, peaking during the midday hours. At 07:00, it starts off low at 1, gradually rising to 2 by 08:00. By 09:00, it reaches 3, signaling a moderate increase in sun intensity. The sun is at its highest strength from 12:00 to 13:00, where it hits 5—a level that calls for protective measures if you're outdoors. As the afternoon progresses, the index dips back down; by 16:00, it slips to 3, then continues its decline to 1 by 19:00. It’s a day that emphasizes midday caution but rewards your evening relaxation with a retreat from intense UV rays.
| 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 | 4 | moderate | 30 min |
| 12:00 | 5 | moderate | 30 min |
| 13:00 | 5 | moderate | 30 min |
| 14:00 | 4 | moderate | 30 min |
| 15:00 | 4 | moderate | 30 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
During the year, the UV Index varies significantly, indicating fluctuating levels of sun exposure risk. From January to February, the UV Index remains low at 1, with a burn time of 45 minutes, making it relatively safe for outdoor activities. As spring approaches, the index rises to 2 in March and reaches 3 in April, transitioning into the moderate category with a burn time of 30 minutes. The high-risk months occur in June and July, when the UV Index peaks at 6, necessitating cautious sun exposure, since the burn time is reduced to just 25 minutes. In August, the UV Index decreases slightly to 4, followed by a gradual decline to 3 in September and 2 in October. By November and December, the UV Index drops back to 1, again allowing for 45 minutes of safe exposure. Visitors and residents are advised to take greater precautions during the summer months and to use sunscreen, wear protective clothing, and seek shade, especially during peak hours.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Viken | 1 | 1 | 2 | 3 | 4 | 6 | 6 | 4 | 3 | 2 | 1 | 1 |
| Sollentuna UVI | 1 | 2 | 3 | 4 | 5 | 7 | 7 | 5 | 4 | 2 | 1 | 1 |
| Uppsala UVI | 1 | 2 | 3 | 4 | 5 | 7 | 7 | 5 | 4 | 2 | 1 | 1 |
| Stockholm UVI | 1 | 2 | 3 | 4 | 5 | 7 | 7 | 5 | 4 | 2 | 1 | 1 |
| Goeteborg UVI | 1 | 2 | 3 | 5 | 6 | 7 | 7 | 6 | 5 | 2 | 1 | 1 |
| Malmoe UVI | 1 | 2 | 3 | 5 | 6 | 7 | 7 | 6 | 5 | 3 | 1 | 1 |