The climate of Brussels

Brussels averages 52°F (11°C) across the year, with 7.7 hours of sunshine a day and 31.6 inches (802 mm) of precipitation. The spread runs from January, at 43°F (6°C), to August, at 74°F (23°C).

Climate quick facts

Hottest month: August - highs near 74°F (23°C)
Coldest month: January - highs near 43°F (6°C)
Decade extremes (2015-2024): 101°F (38°C) high · 17°F (-8°C) low
Wettest month: December (14 rainy days) · Sunniest: July (11.4 h sun/day)
Climate type: oceanic
Annual swing: 15°C between the average warmest and coolest month · day to night: 7°C
Snow: about 4 days a year
Average humidity: 78%

Temperatures through the year

Snow falls on roughly 4 days a year, mostly December through April. January bottoms out at 43°F (6°C) in daylight, 35°F (2°C) after dark. At its warmest, in August, Brussels runs to 74°F (23°C) in the afternoon and back to 59°F (15°C) by dawn. Days and nights are about 7°C apart on average - narrower than about 76% of the cities we track.

Rain, sun and snow

Five of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is May through September. Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 101°F (38°C) and the lowest daily minimum 17°F (-8°C).

How Brussels compares

27% of the year's precipitation falls in its wettest three months - more evenly spread than almost every other city we track.
The city sees 7.7 hours of sunshine on an average day - duller than all but 11% of the 3496 cities we track.

Ranked against every city in our dataset, each measured on the same ten-year window.

Monthly climate table

Monthly averages for Brussels based on 2015–2024 weather data. Daylight is sunrise to sunset on the 15th; wet-day chance is the share of days with measurable rain.
Month	High	Low	Rain days	Precipitation	Sunshine	Daylight	Wet-day chance	Humidity
January	43°	35°	14	3.0 in	3.6 h/day	8.4 h	45%	87%
February	47°	36°	12	2.6 in	5.4 h/day	9.9 h	43%	82%
March	52°	38°	14	2.8 in	7.0 h/day	11.7 h	44%	78%
April	57°	41°	11	1.9 in	9.7 h/day	13.7 h	36%	72%
May	65°	48°	12	2.5 in	10.9 h/day	15.5 h	38%	72%
June	72°	55°	10	2.8 in	11.3 h/day	16.5 h	34%	71%
July	73°	58°	11	2.7 in	11.4 h/day	16.1 h	35%	71%
August	74°	59°	12	2.3 in	10.7 h/day	14.5 h	37%	72%
September	68°	54°	11	2.5 in	9.0 h/day	12.5 h	38%	76%
October	60°	49°	13	2.8 in	6.0 h/day	10.6 h	41%	82%
November	51°	41°	14	2.7 in	4.5 h/day	8.8 h	45%	86%
December	46°	38°	14	3.0 in	3.2 h/day	8.0 h	45%	88%

Brussels month by month

Average high and low for each month, with the bar showing where it sits in Brussels's year (left is the coldest night, right is the warmest afternoon).

January

Coldest

43°35°

Rain: 14 days
Sunshine: 3.6 h
Daylight: 8.4 h
Snow: 2 days

February

47°36°

Rain: 12 days
Sunshine: 5.4 h
Daylight: 9.9 h

March

52°38°

Rain: 14 days
Sunshine: 7.0 h
Daylight: 11.7 h

April

Driest

57°41°

Rain: 11 days
Sunshine: 9.7 h
Daylight: 13.7 h

May

65°48°

Rain: 12 days
Sunshine: 10.9 h
Daylight: 15.5 h

June

72°55°

Rain: 10 days
Sunshine: 11.3 h
Daylight: 16.5 h

July

Sunniest

73°58°

Rain: 11 days
Sunshine: 11.4 h
Daylight: 16.1 h

August

Hottest

74°59°

Rain: 12 days
Sunshine: 10.7 h
Daylight: 14.5 h

September

68°54°

Rain: 11 days
Sunshine: 9.0 h
Daylight: 12.5 h

October

60°49°

Rain: 13 days
Sunshine: 6.0 h
Daylight: 10.6 h

November

51°41°

Rain: 14 days
Sunshine: 4.5 h
Daylight: 8.8 h

December

Wettest

46°38°

Rain: 14 days
Sunshine: 3.2 h
Daylight: 8.0 h

Warmer places to go, by month: January · February · March · April · May · June · July · August · September · October · November · December

Seasons in Brussels

Spring (March through May)

Spring in Brussels is crisp but comfortable, with daytime highs averaging 58°F (14°C) and nights around 42°F (6°C); rain falls on around 36 of the 90 days.

Summer (June through August)

Summer in Brussels settles into easy warmth, with daytime highs averaging 73°F (23°C) and nights around 57°F (14°C); rain falls on around 33 of the 90 days. Daylight is generous - around 11.1 hours of sun a day.

Fall (September through November)

Fall in Brussels runs cool rather than cold, with daytime highs averaging 60°F (15°C) and nights around 48°F (9°C); rain falls on around 38 of the 90 days.

Winter (December through February)

Winter is chilly here - highs near 46°F (8°C), nights near 36°F (2°C), and rain falls on around 40 of the 90 days, plus about 3 snowy days.

Climate questions, answered

Is Brussels hot in summer?

August averages 74°F (23°C). Summers here stay temperate rather than hot.

How often does it rain in Brussels?

About 147 days bring measurable precipitation, totalling 31.6 inches (802 mm). That works out at roughly 5.5 mm on an average wet day.

What should I pack for Brussels?

It depends on the month: August runs to 74°F (23°C) while January holds at 43°F (6°C). The full month-by-month breakdown is in the packing notes above.

How humid does Brussels get?

Relative humidity averages 78% across the year, which reads as very humid. The most comfortable stretch falls in the drier half of the year.

Best time to visit Brussels

Aim for May to September if you get the choice: warm days, manageable rainfall and plenty of daylight line up, and highs average 70°F (21°C) against roughly 11 wet days a month. For the same question asked the other way round, see where else is warm in May.

Pack for Brussels with a warm jacket and layers for the cooler season and proper waterproofs rather than an umbrella - wet days are the norm here. August nights average 59°F (15°C), so evenings rarely match the afternoons.

Brussels temperature records (2015-2024)

Highest recorded

101°

in July

Lowest recorded

17°

in February

Annual precipitation

31.6"

Snowy days / yr

4

Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need the precipitation in other units? The mm-to-inches rainfall converter handles it.

Brussels, Belgium Climate & Monthly Averages