August weather forecast
Brussels, Belgium

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A beautiful slope garden with several museums, in the city of Brussels, Belgium
A beautiful slope garden with several museums, in the city of Brussels, Belgium

Weather in August

In August, the summer temperatures persist, albeit with a slight drop in daytime highs to 22.6°C (72.7°F). This climatic pattern in Brussels resonates with that of July, with an impressive amount of sunshine despite the waning daylight hours. As days shorten slightly heading into the fall yet remaining warm and moderately humid, August offers some of the best weather conditions for outdoor activities. Vigilance regarding intermittent rain is advised since rainfall days persist during these summer months.

Temperature

The advent of August in Brussels, Belgium, brings an average high-temperature of a pleasant 22.6°C (72.7°F), exhibiting minor difference from the previous month. Brussels encounters an average low-temperature of 13.6°C (56.5°F) during August nights.

Humidity

The average relative humidity in August in Brussels is 75.5%.

Rainfall

In Brussels, during August, the rain falls for 14.5 days and regularly aggregates up to 79mm (3.11") of precipitation. In Brussels, during the entire year, the rain falls for 199.6 days and collects up to 853mm (33.58") of precipitation.

Snowfall

May through October are months without snowfall in Brussels, Belgium.

Daylight

In Brussels, the average length of the day in August is 14h and 29min.
On the first day of August in Brussels, sunrise is at 06:09 and sunset at 21:28. On the last day of the month, sunrise is at 06:55 and sunset at 20:29 CEST.

Sunshine

The average sunshine in August in Brussels is 6.1h.

UV index

In Brussels, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.
Note: The UV index of 6 in August translates into these instructions:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
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Frequently asked questions

What is the average August temperature in Brussels?

Brussels in August has an average high-temperature of 22.6°C (72.7°F) and an average low-temperature of 13.6°C (56.5°F).

What is the average humidity in August in Brussels?

The average relative humidity in August in Brussels, Belgium, is 75.5%.

How many days does it rain in August in Brussels?

In Brussels, Belgium, in August, it is raining for 14.5 days, with typically 79mm (3.11") of accumulated precipitation.

When it does not snow in Brussels?

In Brussels, snow does not fall in May through October.

How many hours of daylight does Brussels have in August?

The average day length in August in Brussels is 14h and 29min.

When is the sunrise / sunset in August in Brussels?

On the first day of August in Brussels, Belgium, sunrise is at 06:09 and sunset at 21:28. On the last day of the month, sunrise is at 06:55 and sunset at 20:29 CEST.

How many hours of sunshine does Brussels have in August?

The average sunshine duration in August in Brussels is 6.1h.

What is the UV index reading in August in Brussels?

The average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average UV index

Average temperature in August
Brussels, Belgium

Average temperature in August - Brussels, Belgium
  • Average high temperature in August: 22.6°C

The warmest month (with the highest average high temperature) is July (23°C).
The month with the lowest average high temperature is January (5.7°C).

  • Average low temperature in August: 13.6°C

The month with the highest average low temperature is July (14°C).
The coldest months (with the lowest average low temperature) are January and February (0.7°C).

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Average humidity in August
Brussels, Belgium

Average humidity in August - Brussels, Belgium
  • Average humidity in August: 75.5%

The month with the highest relative humidity is December (88.8%).
The month with the lowest relative humidity is April (72.5%).

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Average rainfall in August
Brussels, Belgium

Average rainfall in August - Brussels, Belgium
  • Average rainfall in August: 79.3mm

The wettest month (with the highest rainfall) is December (81mm).
The driest month (with the least rainfall) is April (51.3mm).

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Average rainfall days in August
Brussels, Belgium

Average rainfall days in August - Brussels, Belgium
  • Average rainfall days in August: 14.5 days

The month with the highest number of rainy days is December (19.3 days).
The month with the least rainy days is July (14.3 days).

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Average snowfall days in August
Brussels, Belgium

Average snowfall days in August - Brussels, Belgium
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (5.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in August /
Average sunshine in August
Brussels, Belgium

Average daylight in August / Average sunshine in August - Brussels, Belgium
  • Average daylight in August: 14h and 3min

The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 0min).

  • Average sunshine in August: 6h and 1min

The month with the most sunshine is July (Average sunshine: 6h and 30min).
The month with the least sunshine is December (Average sunshine: 1h and 30min).

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Average UV index in August
Brussels, Belgium

Average UV index in August - Brussels, Belgium
  • Average UV index in August: 6

The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 1).

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Brussels, Belgium

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