Climate and monthly weather forecast
Brussels, Belgium

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A beautiful slope garden with several museums, in the city of Brussels, Belgium
A beautiful slope garden with several museums, in the city of Brussels, Belgium

The climate of Brussels

Brussels, the vibrant capital of Belgium, experiences a Marine West Coast climate, denoted as Cfb by the Köppen climate classification. The city's geographic location in Northwestern Europe lends to its generally mild, damp weather patterns throughout the year.

Weather parameters in Brussels exhibit fluctuations across the seasons. The most substantial temperature rise takes place between March and June, with average highs elevating from 10.4°C (50.7°F) to 20.6°C (69.1°F), complimented by low humidity at approximately 72.5% to 74.1%. Simultaneously, rainfall increases moderately from 70mm (2.76") in March to 72mm (2.83") in June.

An interesting pattern in Brussels weather is how the rainfall remains consistent throughout the year, varying between a minimum of 51mm (2.01") in April and a maximum of 81mm (3.19") in December, thus maintaining a damp environment. On average, the city deals with rainfall on around half the days in a month, with figures from 14.3 days in July to 19.3 days in December. Snowfall only occurs during winter, most prominently in January and December with 5.2 and 4.6 days, respectively. On a brighter note, sunshine duration fluctuates from a low of 1.5 hours per day in December to a high of 6.5 hours during July.

The best time to visit Brussels

Considering all weather parameters, the most favorable time to visit Brussels emerges during late spring and early summer, particularly from May to June. During this phase, the temperatures hover between a gentle low of 9.2°C (48.6°F) to a warm high of 20.6°C (69.1°F). Also, rainfall stays in a moderate range from 67mm (2.64") to 72mm (2.83") across these months. Furthermore, travelers can honor the extended daylight which lasts from 15.5 hours to 16.4 hours per day, with sunshine enduring between 7.8 hours to 6.3 hours daily, offering excellent conditions for sightseeing.

The worst time to visit Brussels

Brussels reveals its challenging side in the winter months, precisely from December to February. Besides low temperatures from 0.7°C (33.3°F) to 6.1°C (43°F), the city features the highest precipitation levels, spanning 76mm (2.99") to 81mm (3.19"), combined with limited sunshine duration barely reaching 2.2 hours per day. Snowfall is also a common treat, especially in January, adding to the city's rigorous winter charm, which unfortunately restricts outdoor explorations.

Spring weather in Brussels

Spring breathes new life into Brussels from March to May, with average high temperatures leaping to a pleasant range from 10.4°C (50.7°F) to 18.1°C (64.6°F). Rainfall remains mellow, clocking between 70mm (2.76") in March and 67mm (2.64") in May, and bright sunlight clasps the city for up to 6.2 hours per day by the end of the season.

Summer weather in Brussels

Brussels enjoys a warm summer from June to August. Temperature highs are comfortable, rising from 20.6°C (69.1°F) in June to a peak of 23°C (73.4°F) in July before mildly dropping to 22.6°C (72.7°F) by August. Rainfall maintains a steady presence from 72mm (2.83") to 79mm (3.11"), ensuring lush green landscapes. Notably, the sunshine duration ranges from 6.3 hours to 6.5 hours per day, offering perfect opportunities to bask in the summer climate.

Autumn weather in Brussels

Autumn witnesses a descent in Brussels' temperature, sliding from 19°C (66.2°F) in September to 9.5°C (49.1°F) by November. Rainfall follows a similar pattern with totals moving from 69mm (2.72") to 76mm (2.99"), thereby conserving the city's damp nature. Additionally, the daylight shrinks to 9 hours a day by the end of the season, limiting excursions under the sun.

Winter weather in Brussels

Winter engulfs Brussels from December to February, carrying a chilly ambiance with low temperatures falling to 0.7°C (33.3°F) and rarely crossing 6.6°C (43.9°F). Precipitation levels peak at this time with 76mm (2.99") to 81mm (3.19") of rainfall, and snowfall graces the winter scenery. Sunlight proves sparse, barely reaching 1.5 hours to 2.8 hours per day, contributing to the enticing, yet stringent winter experience in the city.

Weather in January

In comparison to the following period, January in Brussels, Belgium experiences markedly cool temperatures with a high average of only 5.7°C (42.3°F) and a cold average low of 0.7°C (33.3°F). Winter jackets are a must-have for the city's inhabitants during this time, with most days being cold and very likely cloudy. Weather in January »

Weather in February

February does not deviate significantly from the conditions in January, although there's a gentle increase in the average high temperature to 6.6°C (43.9°F). The city remains mainly overcast as the winter season continues, with the possibility of snowfall still looming. Weather in February »

Weather in March

As the icy clutches of winter start to dissipate, March ushers in gradually rising temperatures, reaching an average high of 10.4°C (50.7°F). The occasional appearance of warming sunshine contributes to the onset of spring, even though the average relative humidity remains relatively high. Weather in March »

Weather in April

As winter gives way to spring, April in Brussels (Belgium) presents a notable change. Pleasantly warm temperatures are on the rise, with daytime highs reaching 14.2°C (57.6°F). Nonetheless, April rainfall is not uncommon, so umbrellas should stay within reach throughout the month. Weather in April »

Weather in May

A transition to summer begins in May, with conditions warming up nicely in Brussels, Belgium. Significantly higher averages in temperature are registered, with highs reaching 18.1°C (64.6°F). The city now revels in more sunlight hours, even as rainfall persists. Weather in May »

Weather in June

June marks the onset of summer, with an average high temperature of 20.6°C (69.1°F). While the days are indeed warmer, nights in Brussels, however, can still be a tad cool. Rainfall remains a familiar phenomenon, but longer daylight hours culminate in an overall summery feel. Weather in June »

Weather in July

In July, Brussels experiences the peak of summer in terms of temperature, humidity, and UV index. The mercury often caps at a high of 23°C (73.4°F) while the month itself generally has the highest average UV index rating of 7. Those planning to enjoy the outdoors should pack hats, sunglasses, and sunblock to protect against the potent UV rays. Weather in July »

Weather in August

In August, the summer temperatures persist, albeit with a slight drop in daytime highs to 22.6°C (72.7°F). This climatic pattern in Brussels resonates with that of July, with an impressive amount of sunshine despite the waning daylight hours. Weather in August »

Weather in September

September introduces the beautiful season of fall, with a distinguishable ease in the summer warmth, as days cool down to an average high of 19°C (66.2°F). The cityscape becomes a canvas painted in the hues of autumn, even as the rainfall frequency persists per the summertime. Weather in September »

Weather in October

As fall progresses in Brussels, October sees a significant drop in temperatures, the average high reducing to 14.7°C (58.5°F). Coupled with diminishing sunlight and daylight hours, autumn becomes much more pronounced. The weather necessitates an essential wardrobe transition, incorporating warmer clothing and waterproofs. Weather in October »

Weather in November

November indicates the onset of winter, with temperatures dropping rapidly, the average highs reaching just 9.5°C (49.1°F). With the highest relative monthly humidity of 88.2%, the atmosphere takes a chilly turn. Sunlight becomes increasingly scarce as daylight hours keep shortening, and warmer clothing becomes paramount. Weather in November »

Weather in December

December sees Brussels, Belgium embrace winter fully, with the lowest average high temperature of the year at 6.1°C (43°F). Cold evenings, fewer daylight hours, and only about 1.5 sunshine hours per day set the scene for a classic European winter. Weather in December »

Frequently asked questions

What part of the year is the coldest in Brussels?

In Brussels, January is the month with the lowest recorded average temperatures, measuring a high of 5.7°C (42.3°F) and a low of 0.7°C (33.3°F).

How much does it rain in Brussels?

Throughout the year, in Brussels, Belgium, there are 199.6 rainfall days, and 853mm (33.58") of precipitation is accumulated.

When does it snow in Brussels?

Months with snowfall are January through April, November and December.

How many days does it snow in Brussels?

In Brussels, Belgium, during the entire year, snow falls for 23.7 days.

What are the months with the lowest UV index in Brussels?

January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index.

When does it snow the most in Brussels?

February has the most snowfall days of the year in Brussels, Belgium. Snow falls for 5.9 days.

What is the least humid month in Brussels?

The least humid month is April, with an average relative humidity of 72.5%.

What is the driest month in Brussels?

The month with the least rainfall in Brussels, Belgium, is April, when the rain falls for 15.9 days and typically collects 51mm (2.01") of precipitation.

When it does not snow in Brussels?

May through October are months without snowfall in Brussels, Belgium.

When are the longest days in Brussels?

The month with the longest days in Brussels is June, with an average of 16h and 24min of daylight.

What is the month with the highest UV index in Brussels?

With an average maximum UV index of 7, June is the month with the highest UV index in Brussels, Belgium.

What time of the year is the hottest in Brussels?

July, with an average high of 23°C (73.4°F) and a low of 14°C (57.2°F), signifies the warmest month of the year in Brussels.

What month has the most sunshine in Brussels?

With an average of 6.5h of sunshine, July has the most sunshine of the year.

When is Daylight Saving Time (DST) in Brussels?

On Sunday, 27. October 2024, at 03:00, Daylight Saving Time ends in Brussels, and the time zone changes from CEST to CET. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 02:00, and the time zone reverts from CET to CEST.

What is the most humid month in Brussels?

With an average relative humidity of 88.8%, December is the most humid month in Brussels.

What is the rainiest month in Brussels?

The month with the most rainfall is December, when the rain falls for 19.3 days and typically aggregates up to 81mm (3.19") of precipitation.

What is the month with the shortest days in Brussels?

December has the shortest days of the year in Brussels, Belgium, with an average of 8h and 0min of daylight.

What is the month with the least sunshine in Brussels?

December has the least sunshine of the year, with an average of 1.5h of sunshine.

Average temperature
Brussels, Belgium

Average temperature - Brussels, Belgium

The warmest month (with the highest average high temperature) is July (23°C).
The month with the lowest average high temperature is January (5.7°C).

The month with the highest average low temperature is July (14°C).
The coldest months (with the lowest average low temperature) are January and February (0.7°C).

Average humidity
Brussels, Belgium

Average humidity - Brussels, Belgium

The month with the highest relative humidity is December (88.8%).
The month with the lowest relative humidity is April (72.5%).

Average rainfall
Brussels, Belgium

Average rainfall - Brussels, Belgium

The wettest month (with the highest rainfall) is December (81mm).
The driest month (with the least rainfall) is April (51.3mm).

Average rainfall days
Brussels, Belgium

Average rainfall days - Brussels, Belgium

The month with the highest number of rainy days is December (19.3 days).
The month with the least rainy days is July (14.3 days).

Average snowfall days
Brussels, Belgium

Average snowfall days - Brussels, Belgium

The month with the highest number of snowfall days is February (5.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight / Average sunshine
Brussels, Belgium

Average daylight / Average sunshine - Brussels, Belgium

The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 0min).

The month with the most sunshine is July (Average sunshine: 6h and 30min).
The month with the least sunshine is December (Average sunshine: 1h and 30min).

Average UV index
Brussels, Belgium

Average UV index - Brussels, Belgium

The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 1).

Brussels, Belgium

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