Brussels Weather in December
Belgium · Oceanic climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
December in Brussels sees average temperatures ranging from a low of 3.2°C (37.8°F) to a high of 7.4°C (45.3°F), with a mean of 5.3°C (41.5°F). Compared to the annual average of 11.5°C (52.7°F), this month is 6.2°C cooler than the yearly norm. Precipitation averages 78.8mm, making it approximately 6.0mm wetter than the monthly average of 73.0mm. The city receives an average of 2.7 hours of sunshine per day during December, with relative humidity averaging 88.9%. Wind speeds reach an average maximum of 22.7 km/h. Snowfall averages 2.1cm during December, which can affect travel plans and outdoor activities. For travelers, this month offers a temperature experience in Brussels, with wetter-than-average conditions compared to the rest of the year.
Brussels has an oceanic climate similar to London but with slightly warmer summers. I've studied the data and found that the city receives moderate rainfall year-round, with no distinct dry season. The best time for visiting is May to September, when temperatures are most pleasant and the city's outdoor cafés and markets are at their best.
December vs Adjacent Months
| Metric | November | December | January |
|---|---|---|---|
| Mean Temp | 7.8°C (46.0°F) | 5.3°C (41.5°F) | 4.1°C (39.4°F) |
| Rainfall | 67.2mm | 78.8mm | 69.2mm |
| Sunshine | 4.3 hrs | 2.7 hrs | 3.6 hrs |
| Humidity | 87.2% | 88.9% | 87.1% |
| Wind | 21.7 km/h | 22.7 km/h | 23.7 km/h |
| Rainy Days | 18.4 | 19.6 | 17.6 |
| Snowfall | 1.6 cm | 2.1 cm | 4.3 cm |
Seasonal Context
December falls in Winter in the Northern Hemisphere. Winter is the coolest season with the shortest daylight hours. For travelers visiting Brussels in December, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Brussels in December?
The average temperature in Brussels during December ranges from 3.2°C (37.8°F) to 7.4°C (45.3°F), with a mean of 5.3°C (41.5°F).
How much does it rain in Brussels in December?
Brussels receives an average of 78.8mm of precipitation in December, spread across approximately 19.6 rainy days.
What should I pack for Brussels in December?
Based on December weather data, pack warm layers, a medium jacket, and waterproof outerwear.
Is December a good time to visit Brussels?
December is a cooler month, suitable for travelers who prefer mild weather and fewer crowds. Pack warm layers and enjoy indoor attractions.
Other Months for Brussels
Cities with Similar December Climate (Oceanic)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 50.85°, 4.35°. Timezone: Europe/Brussels. Last updated: 2026-07-30.