August Weather in Brussels, United States

Last updated: June 24, 2025

In August, the average temperature in Brussels, United States hovers around 21°C (70°F). Expect a minimum of 12°C (53°F) and a maximum of 29°C (85°F), providing a comfortable range for outdoor activities. However, be prepared for some rain, with 96 mm (3.8 in) of precipitation spread over 10 days. The atmosphere has a typical average humidity of 73%, making it a perfect time to enjoy the lush surroundings!

August Temperature in Brussels

In August in Brussels, the average temperature is 21°C (70°F). Maximums can reach 29°C (85°F), while minimums can drop to as low as 12°C (53°F). This mild climate makes Brussels an ideal destination for travelers seeking pleasant weather and comfortable conditions for outdoor activities.

August Weather in Brussels: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Brussels, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brussels, August typically has an average temperature of 21°C (70°F), with highs reaching up to 29°C (85°F) and lows dropping to around 12°C (53°F).

Data source: Temperature data for Brussels generated using information from the Copernicus Climate Change Service.

August Precipitation in Brussels

In Brussels in August, the total precipitation amount is 96 mm (3.8 in) over a span of 10 days.

August Precipitation Trends in Brussels

The chart displays monthly precipitation patterns in Brussels, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Brussels, August typically receives around 96 mm (3.8 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

August Humidity in Brussels

In Brussels in August, humidity is 73%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace that can make outdoor activities feel sweltering, so it's essential to stay hydrated and take breaks in the shade while exploring.

August Average Humidity in Brussels

This chart illustrates the average monthly humidity levels in Brussels, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Brussels is approximately 73%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Brussels

In Brussels in August, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Brussels.

Maximum UV Index Levels in Brussels for August

The chart shows the monthly maximum UV Index (UVI) for Brussels in August, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In August, the maximum UV index in Brussels typically reaches 9, which falls under the very high exposure category.

Data source: Brussels August UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How August Weather in Brussels Compares to Other Months

Weather in Brussels varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Brussels, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Brussels, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (23°F)	42 mm (1.6 inches)	89%	low
February Weather	-5°C (22°F)	50 mm (2.0 inches)	90%	moderate
March Weather	0°C (32°F)	58 mm (2.3 inches)	87%	moderate
April Weather	5°C (41°F)	92 mm (3.6 inches)	84%	high
May Weather	11°C (53°F)	95 mm (3.8 inches)	77%	very high
June Weather	18°C (64°F)	101 mm (4.0 inches)	75%	very high
July Weather	22°C (72°F)	90 mm (3.6 inches)	74%	very high
August Weather	21°C (70°F)	96 mm (3.8 inches)	73%	very high
September Weather	17°C (63°F)	66 mm (2.6 inches)	78%	high
October Weather	11°C (51°F)	99 mm (3.9 inches)	84%	moderate
November Weather	3°C (37°F)	53 mm (2.1 inches)	89%	moderate
December Weather	-2°C (29°F)	56 mm (2.2 inches)	87%	low