Weather in Brussels

Stay up to date with the latest weather conditions in Brussels. In this section, you will find current data, forecasts, and useful charts to help plan your stay in the capital of Belgium.

The climate in Brussels, the capital of Belgium, can be characterized as temperate maritime. This means the city experiences all four seasons with relatively mild transitions between them. The weather here is quite changeable, so being prepared for a little rain is never a bad idea at any time of year, as confirmed by frequent days with precipitation.

Summer in Brussels is usually warm and pleasant, with average temperatures in June-August around 17-19°C, and maximum values during this period reaching a comfortable 22-23°C. Winters here are generally mild; the average temperature in December-February rarely drops significantly below freezing, hovering around 4-6°C. Spring and autumn are classic transitional seasons with pleasant coolness and gradual temperature changes. One of the key features of the local climate is the high probability of precipitation throughout the year: according to data, the number of rainy days varies from 10 to 16 per month, indicating frequent, though not always heavy, rains.

The temperature regime in Brussels demonstrates a clear change of seasons, offering diverse weather conditions throughout the year. The warmest month is usually August, when the average temperature reaches 19.1°C, and daytime highs can rise to a pleasant 23.4°C, while nights remain comfortable with lows around 14.8°C. Conversely, January is the coldest month, with an average temperature of 4.5°C. During this period, daytime temperatures hover around 6.7°C, and nighttime temperatures can drop to 2.3°C, sometimes bringing light frosts.

Summer months in Brussels — from June to August — are characterized by predominantly pleasantly warm weather. In June, the average temperature is 17.7°C (minimum 13.2°C, maximum 22.3°C), gradually increasing towards July with an average temperature of 18.7°C (minimum 14.3°C, maximum 23.2°C) and peaking in August. Daytime highs during this period are often in the range of 22-23°C, creating ideal conditions for walking and sightseeing. Nights bring refreshing coolness, with temperatures rarely dropping below 13-15°C. Although intense heat is atypical for Brussels, sunny days can feel quite warm.

Winter in the capital of Belgium, covering December, January, and February, is distinguished by cool but generally mild weather. Average temperatures in these months range from 4.5°C in January (minimum 2.3°C, maximum 6.7°C) to 5.9°C in February (minimum 2.8°C, maximum 8.9°C), while December shows an average temperature of 5.6°C (minimum 3.6°C, maximum 7.7°C). Daytime highs usually hold within 6-9°C, and nighttime lows drop to 2-4°C. Severe frosts are rare, though light frosts are possible. It is worth noting that diurnal temperature fluctuations in Brussels are more pronounced in the warm months, especially from April to September, when the difference between daytime highs and nighttime lows can reach 8-9°C, while in winter this difference is usually 4-6°C.

Precipitation in Brussels is a fairly frequent phenomenon throughout the year, although the total amount, according to monthly averages, remains small. Be prepared for the fact that the chance of rain exists almost always, regardless of the season. The number of days with precipitation in the capital of Belgium varies from 10 in June and July to 16 days in December, highlighting the changeable nature of the local weather.

Although there is no distinct rainy season or dry period in Brussels, some months stand out slightly. The highest total precipitation, though it amounts to only about 3 mm on average, falls in October and December. In other months, this figure holds at around 2 mm. In terms of frequency, December is the month with the highest number of rainy days (16 days). The fewest rainy days, at 10 days each, are observed in June and July, making these summer months the periods with the lowest probability of encountering rain, though it should not be ruled out completely.

The nature of precipitation in Brussels is most often light or moderate rain, occasionally turning into drizzle. This explains the frequent precipitation despite the small total volume. In winter months, especially in January (when the average minimum temperature is 2.3°C) and December (average minimum temperature 3.6°C), as well as sometimes in February, rain can change to snow or sleet. However, the formation of a stable snow cover is not typical for the city. In the warm season, precipitation may fall in the form of short, refreshing showers.

When packing for Brussels, remember its changeable weather and frequent, though usually not heavy, precipitation characteristic of Belgium. The key to a comfortable trip at any time of year is layering your clothes. Indispensable companions will be comfortable waterproof shoes for long walks on cobblestones, as well as an umbrella or a light waterproof jacket, preferably with a hood and windproof properties. The weather can change throughout the day, so the ability to remove or add a layer of clothing will be very handy.

In the summer months (June-August), when the average temperature hovers around 17-19°C, and the maximum reaches 22-23°C, you will need light clothing: t-shirts, shirts, dresses, or shorts. However, considering the likelihood of rain (10-14 wet days per month) and possible evening coolness, do not forget to grab a light sweater, cardigan, or windbreaker. Sunscreen and sunglasses will also be useful on sunny days. For a winter trip (December-February), when the average temperature stays around 4-6°C, warm items are mandatory: sweaters, insulated trousers, a warm jacket or coat, a hat, a scarf, and gloves. Although severe frosts are rare, high humidity and wind can intensify the feeling of cold.

In spring (March-May) and autumn (September-November), the weather in Brussels is most variable. Temperatures gradually rise in spring (from 7.5°C to 13.6°C on average) and fall in autumn (from 16.1°C to 7.8°C). In these transitional seasons, the principle of layering is especially important. Bring both light items and warmer ones (for example, a fleece jacket or jumper) and, of course, do not forget a waterproof jacket and an umbrella. Comfortable shoes capable of withstanding both sun and rain will make your walks around the city as comfortable as possible.