Brussels Weather in January
Belgium · Oceanic climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
January in Brussels sees average temperatures ranging from a low of 1.9°C (35.4°F) to a high of 6.5°C (43.7°F), with a mean of 4.1°C (39.4°F). Compared to the annual average of 11.5°C (52.7°F), this month is 7.4°C cooler than the yearly norm. This is the coldest month of the year, with average lows of 1.9°C (35.4°F). Precipitation averages 69.2mm, making it approximately 4.0mm drier than the monthly average of 73.0mm. The city receives an average of 3.6 hours of sunshine per day during January, with relative humidity averaging 87.1%. Wind speeds reach an average maximum of 23.7 km/h. Snowfall averages 4.3cm during January, which can affect travel plans and outdoor activities. For travelers, this month offers a coldest month of the year experience in Brussels, with drier-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.
January vs Adjacent Months
| Metric | December | January | February |
|---|---|---|---|
| Mean Temp | 5.3°C (41.5°F) | 4.1°C (39.4°F) | 6.3°C (43.3°F) |
| Rainfall | 78.8mm | 69.2mm | 79.2mm |
| Sunshine | 2.7 hrs | 3.6 hrs | 4.9 hrs |
| Humidity | 88.9% | 87.1% | 81.5% |
| Wind | 22.7 km/h | 23.7 km/h | 27.2 km/h |
| Rainy Days | 19.6 | 17.6 | 19.0 |
| Snowfall | 2.1 cm | 4.3 cm | 2.1 cm |
Seasonal Context
January falls in Winter in the Northern Hemisphere. Winter is the coolest season with the shortest daylight hours. For travelers visiting Brussels in January, 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 January?
The average temperature in Brussels during January ranges from 1.9°C (35.4°F) to 6.5°C (43.7°F), with a mean of 4.1°C (39.4°F).
How much does it rain in Brussels in January?
Brussels receives an average of 69.2mm of precipitation in January, spread across approximately 17.6 rainy days.
What should I pack for Brussels in January?
Based on January weather data, pack heavy winter clothing, thermal layers, and a warm coat.
Is January a good time to visit Brussels?
January 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 January 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.