Brussels features a temperate maritime climate with mild summers, cool to cold winters, and rainfall spread throughout the year. The city is known for its variable weather, frequent clouds, and moderate temperature swings. While sunshine is limited in winter, spring and summer bring longer days, making Brussels a comfortable destination for year-round travel.
The best times to travel section shows how the months compare for a visit, so you can find the time of year that fits what you want to do.
Background colours of the months:
The colour shows the typical temperature: yellow (hot), green (mild) and blue (cold). How strong the colour is shows the travel season: full colour means high season, soft colour means shoulder season and soft-striped means off season.
Weather symbols:
Each month has one symbol showing what the weather is typically like, such as hot and sunny, freezing or a rainy or snowy season. Use them to quickly spot months that match the weather you want, or to avoid the ones that don't.
Crowdedness:
The people icon shows how busy the place usually is. The more people, the more crowded it gets.
Additional notes:
The grey info boxes point out special things worth knowing, like recurring weather issues or seasonal events.
Brussels experiences a temperate oceanic climate, influenced by Atlantic air masses and its inland position. Winters (December–February) are cold and damp, with average daytime highs between 4–7°C and nighttime lows around 0–2°C. Snow is possible but not frequent, typically falling as light flurries that rarely accumulate for long. Winds and humidity can make the cold feel sharper, and fog is common in the colder months. Daylight is limited in winter, with as little as 8–9 hours per day and only 2–3 hours of sunshine on average.
Spring (March–May) sees gradually rising temperatures, from 10°C in March to 18°C in May. Rain remains frequent, but sunshine increases, and city parks bloom with flowers. Summers (June–August) are mild and pleasant, with average highs of 20–23°C and lows of 13–14°C. Heatwaves are rare, but humidity can make warm days feel muggy. Rainfall is steady, with July and December among the wettest months, and showers are often brief but unpredictable. Sunshine peaks at 7 hours per day in June and July, and daylight can last up to 16 hours in midsummer. Autumn (September–November) is mild to cool, with temperatures dropping from 19°C in September to 9°C in November. Rain increases, and the city becomes windier and cloudier as winter approaches. Brussels receives about 800–1,000 mm of precipitation annually, with over 180–200 rainy days per year. Winds are generally moderate, but can be brisk during storms, especially in winter and autumn.
| Average climate data for Brussels, Belgium | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average maximum temperature (°C) | 6 | 7 | 10 | 14 | 18 | 21 | 23 | 23 | 19 | 15 | 10 | 6 | 23 |
| Average minimum temperature (°C) | 1 | 1 | 3 | 5 | 9 | 12 | 14 | 14 | 11 | 8 | 4 | 2 | 1 |
| Average precipitation (mm) | 75 | 63 | 71 | 52 | 67 | 73 | 74 | 80 | 68 | 75 | 76 | 82 | 856 |
| Average rainfall days (days) | 19 | 16 | 18 | 16 | 16 | 15 | 14 | 14 | 16 | 17 | 19 | 19 | 199 |
| Average snowfall days (days) | 5 | 6 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 5 | 24 |
| Average relative humidity (%) | 86 | 83 | 77 | 72 | 74 | 74 | 74 | 76 | 80 | 85 | 88 | 89 | 80 |
| Average daily daylight hours (h) | 8 | 10 | 11 | 13 | 15 | 16 | 16 | 14 | 12 | 10 | 9 | 8 | 12 |
| Average daily sunshine hours (h) | 1 | 2 | 3 | 5 | 6 | 6 | 6 | 6 | 4 | 3 | 2 | 1 | 4 |
| Average UV index | 1 | 1 | 3 | 4 | 6 | 7 | 6 | 6 | 4 | 2 | 1 | 1 | 4 |
The best time to visit Brussels is from mid-May to mid-September, when temperatures are mild (15–23°C), daylight is long, and the city is lively with outdoor events and festivals. Spring (April–May) and early autumn (September) also offer pleasant weather, fewer crowds, and beautiful city parks in bloom or autumn colours.
The least favourable time to visit is from November to February, when Brussels is coldest, daylight hours are shortest, and rain, fog, and dampness are most frequent. While winter brings festive charm, outdoor exploration can be less comfortable due to chilly, wet, and unpredictable weather.
Brussels has a temperate maritime climate with mild summers, cool winters, and rainfall spread evenly throughout the year. The weather is variable, with frequent clouds and moderate temperature swings.
Summer temperatures in Brussels typically reach 20–23°C, with occasional warmer days. Heatwaves above 30°C are rare, and humidity can make warm days feel muggy. Evenings are usually cool.
Snow is possible in Brussels, mainly from December to February, but it is usually light and melts quickly. Most winter precipitation falls as rain, and snow cover is rare in the city.
Rain falls throughout the year, but July and December are typically the wettest months. Showers are frequent but often brief, so carrying an umbrella is recommended year-round.
Brussels averages 1,350–1,450 hours of sunshine annually. Summer months have up to 7 hours of sunshine per day, while winter months may see only 2–3 hours daily.
Bring layers, a waterproof jacket, and water-resistant shoes. Even in summer, pack a jumper or light jacket for cool evenings. An umbrella is essential for sudden showers in any season.
Winds are generally moderate but can be brisk during storms, especially in autumn and winter. Humidity is moderate year-round, and dampness can make cold days feel even chillier.
The warmest month, with the highest average maximum temperature, is July (23.1 °C). The month with the lowest average maximum temperature is January (5.7 °C). Overall, the average maximum temperature over the whole year is 14.2 °C.
The month with the highest average minimum temperature is July (14 °C). The coldest month, with the lowest average minimum temperature, is February (0.6 °C). Overall, the average minimum temperature over the whole year is 6.9 °C.
The wettest month, with the highest amount of precipitation, is December (82.2 mm). The driest month, with the least amount of precipitation, is April (51.9 mm). Over the whole year there are 856.3 mm of rainfall on average.
The month with the most days of rain is January (19.2 days). The month with the fewest days of rain is July (14.4 days). Over the whole year there are 199.2 days of rain on average.
The month with the most days of snowfall is February (6 days). The months with the fewest days of snowfall are May, July and August (0 days). Over the whole year there are 24.2 days of snowfall on average.
The month with the highest average relative humidity is December (89.3 %). The month with the lowest average relative humidity is April (72.1 %). The overall average relative humidity over the whole year is 79.8 %.
The month with the longest days, so the most daylight, is June (Average daylight: 16 h). The month with the shortest days, so the least daylight, is December (Average daylight: 8 h). Over the whole year there are 11.9 h of daylight per day on average.
The month with the most sunshine per day is June (Average sunshine: 6.1 h). The month with the least sunshine per day is December (Average sunshine: 1 h). Over the whole year there are 3.8 h of sunlight per day on average.
The month with the highest average UV index is June (UV index: 7). The months with the lowest average UV index are January, February, November and December (UV index: 1). Over the whole year the average UV index is 3.5.
