Brussels Weather in August
Belgium · Oceanic climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
August in Brussels sees average temperatures ranging from a low of 15.1°C (59.2°F) to a high of 23.6°C (74.5°F), with a mean of 19.2°C (66.6°F). Compared to the annual average of 11.5°C (52.7°F), this month is 7.7°C warmer than the yearly norm. This is the hottest month of the year, reaching 23.6°C (74.5°F) on average. Precipitation averages 57.5mm, making it approximately 16.0mm drier than the monthly average of 73.0mm. The city receives an average of 10.9 hours of sunshine per day during August, with relative humidity averaging 72.6%. Wind speeds reach an average maximum of 18.7 km/h. For travelers, this month offers a hottest month of the year experience in Brussels, with drier-than-average conditions compared to the rest of the year.
Brussels has an oceanic climate similar to London but with slightly warmer summers. I've studied the data and found that the city receives moderate rainfall year-round, with no distinct dry season. The best time for visiting is May to September, when temperatures are most pleasant and the city's outdoor cafés and markets are at their best.
August vs Adjacent Months
| Metric | July | August | September |
|---|---|---|---|
| Mean Temp | 18.1°C (64.6°F) | 19.2°C (66.6°F) | 16.4°C (61.5°F) |
| Rainfall | 93.8mm | 57.5mm | 75.2mm |
| Sunshine | 11.3 hrs | 10.9 hrs | 9.2 hrs |
| Humidity | 73.1% | 72.6% | 77.2% |
| Wind | 19.3 km/h | 18.7 km/h | 18.4 km/h |
| Rainy Days | 20.8 | 18.4 | 16.0 |
Seasonal Context
August falls in Summer in the Northern Hemisphere. Summer brings the warmest conditions of the year with the longest daylight hours. For travelers visiting Brussels in August, the data indicates favorable conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Brussels in August?
The average temperature in Brussels during August ranges from 15.1°C (59.2°F) to 23.6°C (74.5°F), with a mean of 19.2°C (66.6°F).
How much does it rain in Brussels in August?
Brussels receives an average of 57.5mm of precipitation in August, spread across approximately 18.4 rainy days.
What should I pack for Brussels in August?
Based on August weather data, pack layers including light jackets and t-shirts, plus an umbrella.
Is August a good time to visit Brussels?
August is a good time to visit Brussels, with comfortable temperatures and manageable rainfall. However, it is the hottest month — consider early morning or evening activities.
Other Months for Brussels
Cities with Similar August Climate (Oceanic)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 50.85°, 4.35°. Timezone: Europe/Brussels. Last updated: 2026-07-30.