Last updated: June 2, 2025
In Hollum, Netherlands, understanding the UV Index is crucial for safeguarding your skin health and preventing painful sunburns. With a Cfb climate characterized by mild summers and increased daylight, residents and visitors alike need to be aware of the fluctuating UV levels throughout the day. During peak hours, particularly between 11 AM and 3 PM, the UV Index can soar to 7, indicating a high risk of harm from unprotected sun exposure. By staying informed about the UV Index, you can enjoy the beautiful Dutch outdoors while effectively protecting yourself from the harmful effects of ultraviolet rays.
As the sun rises, the UV Index begins its steady climb, peaking in the afternoon to signal a strong presence of solar rays. At 07:00, the index starts at a modest 1, indicating low exposure risk. By 08:00, it rises to 2, still manageable but worth noting. The intensity builds through the morning, reaching 4 by 10:00 and escalating to 6 at 11:00. As noon approaches, the UV Index surges to a maximum of 7 at 12:00, remaining steadfast at this level until 15:00. As afternoon turns to evening, the index gradually declines, reflecting the sun's retreat, measuring 4 at 17:00 and settling to 2 by 19:00. Stay vigilant during those peak hours, especially between 12:00 and 15:00, to ensure safe sun exposure!
| 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 | 6 | high | 25 min |
| 12:00 | 7 | high | 25 min |
| 13:00 | 7 | high | 25 min |
| 14:00 | 7 | high | 25 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 6 | high | 25 min |
| 17:00 | 4 | moderate | 30 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 2 | low | 45 min |
The UV Index exhibits notable seasonal changes, peaking during the summer months. From January to February, the exposure is low, with a minimal risk of skin damage, allowing for a safe burn time of up to 45 minutes. As spring arrives in March and April, the UV Index begins to rise, reaching moderate levels, and reducing safe exposure time to 30 minutes. The summer months of May through August mark the high-risk period, with a consistent UV Index of 7, where the burn time drops to just 25 minutes. In September and October, conditions ease back to moderate levels, allowing for a slightly increased burn time of 30 minutes. By November and December, exposure risk returns to low, permitting 45 minutes of safe sun exposure. Visitors and residents should prioritize sun protection, especially from late spring to early fall, by wearing sunscreen, protective clothing, and seeking shade during peak hours.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hollum | 1 | 2 | 3 | 5 | 7 | 7 | 7 | 7 | 5 | 3 | 2 | 1 |
| Amsterdam UVI | 1 | 2 | 4 | 5 | 7 | 8 | 8 | 7 | 5 | 3 | 2 | 1 |
| Utrecht UVI | 1 | 2 | 4 | 5 | 7 | 8 | 8 | 7 | 5 | 3 | 2 | 1 |
| Rotterdam UVI | 1 | 2 | 4 | 5 | 7 | 8 | 8 | 7 | 5 | 3 | 2 | 1 |
| Eindhoven UVI | 1 | 2 | 4 | 5 | 7 | 8 | 8 | 7 | 5 | 3 | 2 | 1 |
| Tilburg UVI | 1 | 2 | 4 | 5 | 7 | 8 | 8 | 7 | 5 | 3 | 2 | 1 |