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Brussels in August: Weather, Average temperature and Climate

Planning a trip and want to know what the weather in Brussels in August will be like? Take a look at our weather guide for Brussels, based on historical data.
Check flight prices to Brussels on Avionero:
August

Weather in Brussels in August 2025

Good Weather
Warm
🌧️
Rainy
✈️
$758 - $758
Planning a trip to Brussels in August? You are in luck! The weather is generally good, with an average maximum temperature of +73°F and approximately 5 sunny days. Just be prepared for some rain, as there are usually around 16 rainy days and 67 mm of precipitation. Expect good weather and pack accordingly to enjoy the outdoors. Search flights in one click on Avionero.
Good to know:
  • August is usually the hottest month of the year in Brussels;

Average weather

☀️
+73°F
Avg. max. temperature
+43°F
Min.
+97°F
Max.
67 mm
Total precipitation
73%
Avg. humidity
2 m/s
Avg. wind
5 ☀️
Sunny Days
7 ⛅️
Cloudy
16 🌦
Rainy
Our opinion: Brussels has good weather in August.
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Average temperature in Brussels in August

Here are the expected maximum, average and minimum temperatures in Brussels for August based on the historical data.
Last Year
Historical Data

Going from a maximum of +82°F during the day to a minimum of +50°F during the night, the temperature in August averages around +72°F.

The average maximum temperature goes down 11% by the end of the month, compared with the beginning of the month, from +68°F to +64°F.

Is Brussels warm or cold in August?

Brussels is typically warm in August.

Maximum temperatures go up compared to the previous month from +73°F to +73°F. The minimum temperature also goes up from +57°F to +57°F.

It’s generally warm, but pack a long-sleeve shirt for evenings.

August is the hottest month in Brussels, here is the comparison with other months:

Travel to Brussels

Click to see more details
✈️
51
Flights per week
$758
Min. Price
$758
Max. Price

Climate in Brussels in August

Brussels weather looks like this, on average, in August and the surrounding months.
JulyAugustSeptember
Avg. temperature
+73°F+73°F+68°F
Min. temperature
+41°F+43°F+37°F
Max. temperature
+104°F+97°F+95°F
Rainfall
69 mm67 mm65 mm
Wind
2 m/s2 m/s3 m/s
Humidity
73%73%78%
Air pressure
1015 HPa1015 HPa1016 HPa
Sunny days
555
Cloudy days
778
Rainy days
161615
Snowy days
000

August weather is still as good as in July. The temperature levels stay the same in the area of +73°F for average maximum temperature during the day. As August arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 69 mm to 67 mm. Humidity levels don’t change as the month goes on, averaging around 73%. The average wind speed doesn’t change much during August, staying around 2 m/s. The amount of sunny days stay about the same, averaging 5 sunny days during the month.

Next month (September) brings a further decline in the weather.

Wind

Wind speed in Brussels in August based on historical data.
Last Year
Historical Data

The average wind speed is 3 m/s getting up to 6 m/s which is a medium breeze. You can feel it, especially getting out of the water.

The average wind speed in Brussels is gradually decreasing during August, going from 5 m/s to 4 m/s over the course of the month.

Rain

Amount of rainfall in mm during August in Brussels based on historical data.
Last Year
Historical Data
Typically, there is a 52% chance of rain on an average day in August, with total rainfall of approximately 75 mm. The maximum amount of rainfall per day is around 9 mm, which is considered light rain. August is a pretty wet month with over 16 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of wellies.
August is one of the rainiest months in Brussels, here is a comparison with other months, total mm:
Brussels wettest month is June, where a typical day has a 50% chance of precipitation and 71 mm of rainfall per day. February, on the other hand, is the driest month with a mere 38% chance of precipitation and 49 mm of rainfall per day.

How was the weather last August in Brussels?

This is the weather in Brussels in August 2023:
1 August
☁️
+68°F
2 August
🌧️
+72°F
3 August
☁️
+65°F
4 August
🌧️
+70°F
5 August
☀️
+63°F
6 August
🌧️
+61°F
7 August
☀️
+69°F
8 August
☀️
+67°F
9 August
☀️
+71°F
10 August
☀️
+80°F
11 August
☀️
+81°F
12 August
☀️
+74°F
13 August
☀️
+76°F
14 August
☀️
+82°F
15 August
☁️
+78°F
16 August
☀️
+74°F
17 August
☁️
+70°F
18 August
☀️
+81°F
19 August
☀️
+78°F
20 August
☀️
+82°F
21 August
☀️
+80°F
22 August
☀️
+76°F
23 August
☀️
+82°F
24 August
☀️
+74°F
25 August
☁️
+70°F
26 August
☀️
+70°F
27 August
☀️
+66°F
28 August
☀️
+68°F
29 August
☀️
+67°F
30 August
🌧️
+65°F
31 August
☀️
+65°F
In August 2023 Brussels had 22 sunny days, 5 cloudy days, and 4 rainy days. The average maximum temperature was +72°F, with an absolute maximum of +82°F and a minimum of +61°F. The average humidity was 81%, with a maximum of 100% and a minimum of 50%. The average wind speed was 3 m/s, with a maximum of 10 m/s and a minimum of 0 m/s.
Are you planning a trip in August?

Climate Change Over the Years

This is how Brussels climate has changed over the last 43 years.

The climate in Brussels in August has not changed that much over the last 43 years.

The average temperature was the lowest in 1985 (+55°F) and the highest in 2022 (+62°F). The driest year was 1996 with only 558 mm of rainfall, and the wettest year was 2022 with 1284 mm.

FAQ

Frequently asked questions about the weather in Brussels in August:

Is August a good time to visit Brussels?

August is a really good time to go to Brussels. The weather is nice so plan your packing around outdoor activities and exploring. Check out other good time to visit Brussels.

Can you sunbathe in Brussels in August?

August is warm in Brussels. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.

Is Brussels rainy in August?

Brussels is often rainy in August. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.

Is it sunny in Brussels in August?

Usually, it’s not very sunny in Brussels in August, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.

How much does it cost to fly to Brussels in August?

The normal prices to fly to Brussels is $758 - $758. It means that the majority of our users have picked flights in this range. To find the best price we recommend you search early, using our flexible dates feature.

Other cities in Belgium

Check out the weather for other cities in Belgium.

Monthly weather in Brussels

Source of the data

For this page, we’ve looked at the typical weather in Brussels, based on historical hourly weather data from January 1, 1979, to December 31, 2023.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.