Weather in Brussels in August 2025
- August is usually the hottest month of the year in Brussels;
Average weather
Average temperature in Brussels in August
Going from a maximum of +28°C during the day to a minimum of +10°C during the night, the temperature in August averages around +22°C.
The average maximum temperature goes down 11% by the end of the month, compared with the beginning of the month, from +20°C to +18°C.
Is Brussels warm or cold in August?
Brussels is typically warm in August.
Maximum temperatures go up compared to the previous month from +23°C to +23°C. The minimum temperature also goes up from +14°C to +14°C.
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:
Climate in Brussels in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +23°C | +23°C | +20°C | ||||
| Min. temperature | ||||||
| +5°C | +6°C | +3°C | ||||
| Max. temperature | ||||||
| +40°C | +36°C | +35°C | ||||
| Rainfall | ||||||
| 69 mm | 67 mm | 65 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 3 m/s | ||||
| Humidity | ||||||
| 73% | 73% | 78% | ||||
| Air pressure | ||||||
| 1015 HPa | 1015 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 5 | 5 | 5 | ||||
| Cloudy days | ||||||
| 7 | 7 | 8 | ||||
| Rainy days | ||||||
| 16 | 16 | 15 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as good as in July. The temperature levels stay the same in the area of +23°C 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
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
How was the weather last August in Brussels?
Climate Change over Years
The climate in Brussels in August has not changed much over the last 43 years.
The average temperature was the lowest in 1985 (+13°C) and the highest in 2022 (+17°C). The driest year was 1996 with only 558 mm of rainfall, and the wettest year was 2022 with 1284 mm.
FAQ
Is August a good time to visit Brussels?
Can you sunbathe in Brussels in August?
Is Brussels rainy in August?
Is it sunny in Brussels in August?
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.