UV Index in Brussels, Belgium

Last updated: May 3, 2025

Understanding the UV Index in Brussels, Belgium is essential for protecting your skin from potential harm caused by ultraviolet radiation. Awareness of UV levels plays a crucial role in preventing sunburn and promoting long-term skin health, which is particularly important given the city's climate. In Brussels, characterized by a temperate maritime climate (Cfb), UV exposure varies throughout the day. With peak UV Index readings reaching 7 around midday, residents and visitors alike should stay informed to minimize risks and enjoy the sun safely. Whether you're strolling through the picturesque streets or relaxing in one of Brussels' beautiful parks, knowing how to manage UV exposure will help you protect yourself and your loved ones.

Hourly UV Index in Brussels

As the sun rises, the UV Index begins its climb, starting at a low 1 at 07:00 and 08:00. By 09:00, it nudges up to 2, but the real intensity hits by 10:00 with a sudden increase to 4. The peak exposure arrives at 12:00, reaching a maximum of 7 and maintaining that level until 14:00. As the afternoon wanes, the index gradually descends: 6 at 15:00, 5 at 16:00, and continuing down to 4 at 17:00. Finally, as the sun sets, the UV Index drops to 2 by 18:00 and returns to a safer 1 by 19:00. Remember to protect your skin, especially during those peak hours!

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
TimeUVICategoryTime to Burn
07:001low45 min
08:001low45 min
09:002low45 min
10:004moderate30 min
11:005moderate30 min
12:007high25 min
13:007high25 min
14:007high25 min
15:006high25 min
16:005moderate30 min
17:004moderate30 min
18:002low45 min
19:001low45 min

Monthly UV Index Trends in Brussels

Throughout the year, UV Index values fluctuate significantly, indicating varying levels of sun exposure risk. The high-risk months are from May to August, where the UV Index reaches its peak at 7-8, classifying them as high to very high exposure. Specifically, June and July present the greatest risk, with a burn time of only 15 minutes. In contrast, the winter months (January, February, November, and December) show a low exposure category with UV Index values of 1-2, allowing for longer safe sun exposure (up to 45 minutes). To ensure safety, it is advisable for visitors and residents to take protective measures during the high UV months, such as wearing sunscreen, protective clothing, and seeking shade, especially during midday hours.

Monthly Maximum UV Index for Brussels, Belgium

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Brussels. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec124578875421
Data source: Statistical UV Index data for Brussels, based on information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

Compare Brussels UV Index with Other Belgium Cities

The table above highlights how UV exposure in Brussels compares to other major locations across Belgium. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.
Brussels's solar exposure compared to other cities in Belgium. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Gent UVI124578875321
Antwerpen UVI124578875321
Brussels124578875421
Liege UVI124578875421
Charleroi UVI234578875421