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January Weather in Brussels, United States

Last updated: June 24, 2025

In Brussels, United States, the average temperature for January hovers around -5°C (23°F). Expect lows plunging to -25°C (-14°F) and highs reaching up to 7°C (45°F). With an average precipitation of 42 mm (1.6 in) spread across 7 days, the air is often quite humid, with an average humidity level of 89%. Stay warm and prepared for the chilly days ahead!

January Temperature in Brussels

In January in Brussels, the average temperature is -5°C (23°F). Maximum temperatures can reach 7°C (45°F), while minimums can drop as low as -25°C (-14°F). Travelers should prepare for a cold climate and dress warmly to enjoy their visit.

January Weather in Brussels: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Brussels, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brussels, January typically has an average temperature of -5°C (23°F), with highs reaching up to 7°C (45°F) and lows dropping to around -25°C (-14°F).
JanFebMarAprMayJunJulAugSepOctNovDec222232405264717063513729
Data source: Temperature data for Brussels generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Brussels

In Brussels in January, the total precipitation amount is 42 mm (1.6 in) accumulated over a span of 7 days.

January Precipitation Trends in Brussels

The chart displays monthly precipitation patterns in Brussels, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Brussels, January typically receives around 42 mm (1.6 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec4250589295101909666995356
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Brussels

In Brussels in January, humidity is 89%. With an average temperature of -5°C (23°F), this humidity feels like a biting chill that seeps into your bones, making outdoor activities uncomfortable and prompting frequent breaks to warm up indoors.

January Average Humidity in Brussels

This chart illustrates the average monthly humidity levels in Brussels, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Brussels is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%90%87%84%77%75%75%73%78%84%89%87%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Brussels

In Brussels in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Brussels, you can visit Hourly UV Index in Brussels.

Maximum UV Index Levels in Brussels for January

The chart shows the monthly maximum UV Index (UVI) for Brussels in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Brussels typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910997532
Data source: Brussels January UVI data generated using 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.

How January Weather in Brussels Compares to Other Months

Weather in Brussels varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Brussels, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Brussels, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)42 mm (1.6 inches)89%low
February Weather-5°C (22°F)50 mm (2.0 inches)90%moderate
March Weather0°C (32°F)58 mm (2.3 inches)87%moderate
April Weather5°C (41°F)92 mm (3.6 inches)84%high
May Weather11°C (53°F)95 mm (3.8 inches)77%very high
June Weather18°C (64°F)101 mm (4.0 inches)75%very high
July Weather22°C (72°F)90 mm (3.6 inches)74%very high
August Weather21°C (70°F)96 mm (3.8 inches)73%very high
September Weather17°C (63°F)66 mm (2.6 inches)78%high
October Weather11°C (51°F)99 mm (3.9 inches)84%moderate
November Weather3°C (37°F)53 mm (2.1 inches)89%moderate
December Weather-2°C (29°F)56 mm (2.2 inches)87%low

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