December in Brussels typically experiences cool temperatures, often hovering around freezing, with occasional snowfall. Expect overcast skies and reduced daylight hours. Average highs range from 3C to 7C (37F to 45F), while lows can dip below freezing to -1C to 2C (30F to 36F). Precipitation is common, predominantly in the form of rain, but snow is certainly a possibility.
Understanding the prevailing climatic conditions during this period is crucial for visitors and residents alike. Proper attire, including warm layers, waterproof outerwear, and sturdy footwear, is essential for comfortable navigation of the city’s streets and outdoor markets. The knowledge of potential snowfall and reduced visibility allows for informed travel planning and preparation for potential disruptions. Historically, December has been a month of festive cheer in Brussels, with Christmas markets and celebrations creating a unique atmosphere, although these outdoor activities can be impacted by inclement weather.