Last updated: June 2, 2025
Understanding the UV Index is crucial for residents of Tranby, Norway, as it plays a vital role in safeguarding skin health and preventing sunburn. With the region's Dfb climate, which brings a mix of warm summers and cool winters, UV exposure can fluctuate significantly, particularly during peak sunlight hours. Awareness of the UV levels—ranging from a manageable 1 in the early morning to a moderate 7 around midday—can help you make informed decisions about sun protection, ensuring that you enjoy the sun responsibly and keep your skin healthy all year round.
As the sun rises, the UV Index begins its climb, starting at a mild 1 at 7:00 AM. By 9:00 AM, it reaches a moderate 3, encouraging early risers to consider sun protection. The intensity peaks at 12:00 PM with a vigorous 6, signaling the need for caution. The afternoon sees the UV Index remain high, hitting 7 at 1:00 PM and 2:00 PM, before gradually tapering to 4 by 5:00 PM. As evening approaches, the UV levels decrease, dropping back to a safe 1 by 7:00 PM. Staying informed about these fluctuations can help you enjoy the sun while staying safe!
| 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 | 7 | high | 25 min |
| 14:00 | 7 | 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 | 1 | low | 45 min |
The UV Index experiences notable seasonal changes, peaking during the summer months. From January to February, UV levels remain low (Index 1-2), allowing for a safe burn time of 45 minutes. As spring approaches in March, the index rises to 3, indicating a moderate exposure risk with a reduced burn time of 30 minutes, which continues into April and May. By June and July, UV levels escalate to 7, categorized as high, and the burn time decreases to just 25 minutes, marking this as a high-risk period for sun exposure. The UV Index begins to decline in August (Index 5) and remains moderate until September (Index 4), before returning to low levels in October, November, and December (Index 1-2, with burn times of 45 minutes). Consequently, residents and visitors are advised to take extra precautions during the summer months, particularly from June to July, by seeking shade, wearing protective clothing, and applying sunscreen to prevent sunburn and 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 |
| Tranby | 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 |