Question 1

What is the weather like in Brussels during autumn?

Accepted Answer

Brussels experiences mild to cool autumn weather from September through November, with average temperatures ranging from 15.2°C (59.4°F) in September down to 6.6°C (43.9°F) by November. The 2024 autumn season saw a seasonal average of 11.2°C (52.2°F), making it ideal for exploring the city's parks and historic squares.

September in Brussels remains relatively warm, with temperatures occasionally reaching up to 31.9°C (89.4°F) during late summer heat spells. However, by November, temperatures can drop below freezing, with 2024 recording a minimum of -3.3°C (26.1°F). This dramatic 35°C temperature range across the season means visitors should pack layers.

Autumn 2024 brought 333.6mm (13.1 inches) of total rainfall to Brussels, with September being the wettest month at 155.8mm. October tends to be drier, receiving only 72.4mm in 2024, making it one of the better months for outdoor sightseeing. Humidity levels remain high throughout the season, averaging 85.9%.

Sunshine hours decrease significantly as autumn progresses. September offers generous daylight with 182.9 hours of sunshine, but this drops to just 54.1 hours by November. Early autumn visits to Brussels provide the best combination of pleasant temperatures and adequate sunshine for exploring attractions like the Grand Place and Atomium.

Question 2

What is the driest month in Brussels?

Accepted Answer

July is the driest month in Brussels, receiving just 67.2mm (2.65 inches) of rainfall based on 2024 weather data.

This makes July significantly drier than the annual monthly average of 103.6mm (4.08 inches) for Brussels. The month also offers excellent weather conditions with 240.7 hours of sunshine and pleasant average temperatures of 18.0°C (64.4°F). October follows as the second driest month with 72.3mm (2.85 inches), while March rounds out the top three with 81.7mm.

For comparison, September was the wettest month in Brussels during 2024, recording 155.8mm of precipitation—more than double July's total. The city received 1,243.4mm (49.0 inches) of total rainfall throughout the year.

If you're planning outdoor activities or a visit to Brussels, July offers the best combination of dry weather and warm temperatures. The reduced rainfall during this month makes it ideal for exploring the city's outdoor attractions, from the Grand Place to the parks and gardens. However, visitors should note that even the driest month still sees some rain, so packing a light rain jacket remains practical advice for any trip to Brussels.

Question 3

How cold did Brussels get in winter 2023/24?

Accepted Answer

Brussels experienced its coldest temperature of winter 2023/24 on January 10, 2024, when the mercury dropped to -8.5°C (16.7°F). This cold snap was part of a brief but intense cold period during the second week of January.

During the meteorological winter season (December 2023 to February 2024), Brussels recorded 19 frost days when temperatures fell below freezing. The city also experienced 4 ice days where temperatures remained below 0°C (32°F) throughout the entire day. These occurred primarily during the January cold spell, when daily mean temperatures stayed around -4.8°C (23.4°F).

January 2024 proved to be the coldest month of the winter in Brussels, with an average temperature of 3.1°C (37.6°F). December 2023 was milder at 6.2°C (43.2°F), and February 2024 saw a return to warmer conditions with an average of 7.7°C (45.8°F). The overall winter average stood at 5.6°C (42.1°F).

For visitors planning a winter trip to Brussels, these conditions mean packing warm layers is essential, particularly in January. While sub-zero nights are common, daytime temperatures typically remain above freezing, making outdoor sightseeing comfortable with proper clothing.

Question 4

What were the average summer temperatures in Brussels in 2024?

Accepted Answer

Brussels experienced an average summer temperature of 17.6°C (63.7°F) during the 2024 summer season from June to August. August proved to be the warmest month, with mean temperatures reaching 19.4°C (66.9°F).

Throughout summer 2024, temperatures in Brussels showed a gradual warming trend. June started cooler at 15.5°C (59.9°F), July warmed to 18.0°C (64.4°F), and August delivered the most pleasant summer weather. Daily highs averaged around 30.9°C (87.7°F) across the season, with the peak temperature of 34.1°C (93.4°F) recorded in August.

Overnight temperatures during summer 2024 occasionally dropped to cooler levels, with the lowest reaching 5.0°C (41.0°F) during a cool June night. This temperature variation is typical for Brussels, where evenings can feel refreshingly cool even during the warmest months.

The summer of 2024 brought excellent sunshine to Brussels, with 767.4 total sunshine hours across the three months. However, visitors should note that summer weather in Brussels can be changeable. Total precipitation reached 272.3mm (10.7 inches), with August being particularly wet at 118.9mm of rainfall.

For those planning summer activities in Brussels, the 2024 data suggests August offers the warmest average temperatures, though July provides a good balance of warmth and lower rainfall. Light layers and rain gear remain essential even during the Belgian capital's warmest season.

Question 5

What is the sunniest time of year in Brussels?

Accepted Answer

Brussels enjoys its sunniest weather during the summer months, with August 2024 recording the highest sunshine at 306.7 hours. This makes late summer the peak period for sunny conditions in the Belgian capital.

The summer season from June to August delivered a total of 767.4 hours of sunshine in 2024, averaging 255.8 hours per month. July followed closely with 240.7 hours, while June recorded 220.0 hours. During August, Brussels experienced an average of 9.9 hours of sunshine per day, with pleasant temperatures averaging 19.4°C (66.9°F).

In contrast, winter months see significantly less sunshine. February 2024 was the least sunny month with just 27.7 hours, followed by December at 33.8 hours. The winter period averaged only 44.2 hours of monthly sunshine, roughly six times less than the summer average.

For visitors planning outdoor activities in Brussels, the period from May through September offers the best conditions. May already provides 172.5 hours of sunshine, and September extends the sunny season with 182.9 hours. The entire year 2024 totalled 1,660.8 hours of sunshine, with nearly half occurring during the three summer months alone.

Hoeilaart

Flanders

Wind

Weather Map

FAQ

What is the weather like in Brussels during autumn?

What is the driest month in Brussels?

How cold did Brussels get in winter 2023/24?

What were the average summer temperatures in Brussels in 2024?

What is the sunniest time of year in Brussels?