Last updated: August 21, 2025
August in Brussels, Belgium, offers a dynamic weather experience characterized by warm temperatures and moderate humidity levels averaging 76%. With maximum highs reaching a sweltering 36°C (97°F), the city can see delightful warmth, although it cools down significantly at night, with minimum temperatures dropping to 8°C (46°F). The average daily temperature sits comfortably at 19°C (66°F), making it a pleasant time for outdoor activities. However, visitors should be prepared for occasional rain, as 80 mm (3.2 in) of precipitation is spread over about 14 days throughout the month, adding a refreshing contrast to the summer heat.
In August, Brussels experiences some of its warmest temperatures of the year, with a minimum of 8°C (46°F) and an average of 19°C (66°F), leading to a maximum that can soar up to 36°C (97°F). This peak reflects a notable trend of increasing warmth as summer reaches its zenith, particularly when compared to the cooler months preceding it. The warmth of August provides vibrant atmospheres for outdoor activities and local festivals, often drawing crowds eager to enjoy the city's sunny charm before the autumn chill sets in. With summertime temperatures remaining consistently high, August stands out as a highlight for both locals and visitors alike.
In August, Brussels experiences a notable spike in precipitation, with an average of 80 mm (3.2 in) spread over 14 days. This marks a significant increase compared to the previous months, illustrating a trend of rising rainfall as summer nears its end. With its lush greenery and vibrant atmosphere, the city transforms under the slightly moody skies, encouraging locals and visitors to embrace the charm of the season's last hurrah. As the warm summer months transition into autumn, the combination of heightened humidity and increased rainfall prepares Belgium for the lush landscapes that autumn will bring, reminding everyone of nature's cyclical beauty.
In August, Brussels experiences a noticeable drop in humidity, with levels averaging around 76%—the lowest of the year. This decline marks a shift from the earlier months, where humidity remains consistently high, peaking at 91% in January. As summer transitions into autumn, humidity levels begin to rise again in September, returning to 82%. The overall trend reveals a gradual decrease in humidity from spring to summer, culminating in a more comfortable August, before the annual uptick resumes in fall. This seasonal fluctuation not only defines Brussels' climate but also enhances the city's appeal for outdoor activities during the summer months.
In August, Brussels experiences a UV Index of 7, classified as high, indicating a significant potential for skin damage with extended exposure. As summer reaches its zenith, the burn time stands at 25 minutes, urging residents and visitors alike to be more vigilant about sun protection. This slight decline from July's peak of 8 suggests a transition towards milder sunlight as the season begins to change. Comparatively, the earlier months display a steady increase in UV intensity, starting from a low risk in January and February to the more critical levels observed in June and July. As autumn approaches, it's wise to remain aware of the UV variations throughout the year. For more detailed information, refer to the Brussels UV Index.
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In Brussels, the month of August sees a remarkable 379 hours of sunshine, contributing to the city's vibrant summer atmosphere. This period follows a peak in July, where 406 hours of sunshine creates a lively backdrop for outdoor activities and festivals. As the summer transitions into fall, August maintains a commendable level of sunshine, though a decline is observed heading into September with 319 hours. This trend highlights a clear pattern: as the year progresses, the amount of sunlight increases from the dreary winter months, with a peak in midsummer, before gradually waning into autumn. Overall, August stands out as a sunlit gem, offering a warm embrace before the cooler months set in.
In Brussels, the likelihood of sunny weather experiences notable fluctuations throughout the year, with August offering a 29% chance of sunshine. This is a slight dip compared to the preceding summer months of June and July, which hover around 33% and 34%, respectively. While August tends to signal the end of the sunniest periods, it still maintains a fair chance for bright days, particularly when viewed against the backdrop of Brussels' winter months, where sunshiny opportunities drop drastically to just 11% in January. As summer wanes, this trend highlights a gentle decline in sunlight, yet August remains a month where residents and visitors can still hope to bask in the sun before autumn sets in.
In August, daylight in Brussels begins to gently wane, offering about 14 hours of sunlight each day. This follows the peak of summer in June, when the city enjoys a glorious 16 hours of daylight. As the seasons transition, August reflects a gradual shift towards the shorter days of autumn. The increase in daylight from January's mere 8 hours to October's 10 hours paints a vivid picture of Brussels basking in the vibrant summer months, with each progressive month heralding longer and sunnier days. As September approaches, the daylight slips to 12 hours, signaling the inevitable return to the cozier, darker months that follow. This ebb and flow of daylight beautifully captures the rhythm of the seasons in this charming city.
In August, Brussels experiences a gentle shift in its breezy character, with an average wind speed of 3.4 m/s (8 mph). This marks a slight increase compared to the calmer winds of June and July, but it remains modest overall. Interestingly, while August does not offer the swiftest gusts seen earlier in the year, such as those in January and October, it serves as a transitional period leading into the crisp autumn months. As the summer heat begins to wane, the soft winds contribute to the city's charming outdoor atmosphere, encouraging locals and tourists alike to enjoy the picturesque parks and streets of Brussels.
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.
August and January in Brussels present a striking contrast in weather conditions. August boasts a much warmer climate, with average temperatures around 19°C (66°F), peaking at highs of 36°C (97°F), and a humidity level of 76%. However, it also experiences a fair amount of rainfall, totaling 80 mm (3.2 in) over about 14 days. In contrast, January is markedly cooler, with average temperatures of only 4°C (39°F) and a maximum of 14°C (57°F). The winter month is characterized by lower precipitation levels at 65 mm (2.5 in) across 12 days, yet a higher humidity of 91%. For a more detailed look at January weather in Brussels, visit Brussels weather in January.
August and February present strikingly contrasting weather patterns. August boasts a much warmer average temperature of 19°C (66°F), with high peaks of up to 36°C (97°F), making it a stark contrast to February's chill, where the temperature hovers around a much cooler average of 5°C (42°F) and can drop to as low as -8°C (17°F). Precipitation levels are also notable, with August receiving 80 mm (3.2 in) over approximately 14 days, while February sees slightly less at 69 mm (2.7 in) over 12 days. Additionally, February tends to be a more humid month, with humidity levels at 89% compared to August's 76%. For more insights on February weather, check out Brussels weather in February.
August and March present distinctly different weather experiences. August tends to be much warmer, with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 36°C (97°F), while March sees much cooler conditions, with temperatures ranging from -8°C (17°F) to 23°C (74°F). Despite both months experiencing precipitation on approximately 14 days, August receives more rainfall at 80 mm (3.2 in) compared to March's 70 mm (2.8 in). Additionally, August’s humidity is slightly lower at 76%, whereas March's humidity is higher at 87%, contributing to a more brisk feel during that month. For more specific details on March weather, visit Brussels weather in March.
When comparing the weather in April and August, there is a notable contrast in temperature and precipitation. April experiences cooler temperatures with a minimum of -4°C and an average of 10°C, while August boasts hotter conditions, with temperatures ranging from a minimum of 8°C to a scorching maximum of 36°C. Precipitation is also higher in August, totaling 80 mm over 14 days, compared to April's 37 mm over just 8 days. Humidity levels are relatively high in both months, with April at 85% and August slightly lower at 76%. For more details on April's weather, you can visit Brussels weather in April.
August and May present distinct contrasts in weather. In August, the temperature range is notably wider, with a minimum of 8°C (46°F) and a maximum soaring to 36°C (97°F), averaging at a warm 19°C (66°F). In comparison, May features cooler conditions, with temperatures ranging from a chilly 1°C (33°F) to a maximum of 31°C (88°F), and an average of 13°C (57°F). Precipitation in August is slightly higher at 80 mm (3.2 in) over 14 days, compared to May's 58 mm (2.3 in) across 12 days, while humidity remains high in both months, with August at 76% and May at 82%. For a more detailed look at May weather, you can visit Brussels weather in May.
When comparing the weather in August to that of June, we can see distinct differences in temperature and precipitation. August typically features a wider temperature range with a minimum of 8°C (46°F) and a maximum of 36°C (97°F), while June has slightly cooler temperatures, ranging from 7°C (44°F) to 32°C (91°F). The average temperatures are also a bit higher in August, sitting around 19°C (66°F) compared to June's average of 18°C (65°F). Additionally, August sees more precipitation, totaling around 80 mm (3.2 in) over 14 days, compared to June’s 66 mm (2.6 in) over just 9 days. Interestingly, the humidity levels are relatively similar, with August at 76% and June slightly higher at 82%. For further details about June's weather specifically, check out Brussels weather in June.
When comparing the weather in August and July, both months share similar minimum and average temperatures, with lows of 8°C (46°F) and averages of 19°C (66°F). However, July boasts a slightly higher maximum temperature of 39°C (102°F) compared to August's peak of 36°C (97°F). In terms of precipitation, August experiences a bit more rainfall with 80 mm (3.2 in) over 14 days, whereas July sees 71 mm (2.8 in) across 11 days, suggesting that August may be wetter overall. Humidity levels remain relatively high in both months, with July at 80% and August slightly lower at 76%. For more details on July's weather, you can visit Brussels weather in July.
August typically experiences warmer weather with temperatures ranging from a minimum of 8°C to a maximum of 36°C and an average of 19°C. It tends to be more humid at 76%, with a higher prevalence of precipitation, totaling 80 mm over 14 days. Conversely, September sees cooler temperatures, with a minimum of 4°C and a maximum of 33°C, and an average of 15°C. The month is also drier, receiving only 55 mm of rain over 9 days, and features slightly higher humidity at 82%. For more detailed information, you can visit Brussels weather in September.
In August, the weather can be quite warm, with temperatures ranging from a minimum of 8°C (46°F) to a scorching maximum of 36°C (97°F), and an average temperature of 19°C (66°F). The month experiences significant humidity at 76% and about 80 mm (3.2 in) of rainfall over 14 days. In contrast, October brings much cooler temperatures, with a minimum of 1°C (34°F), an average of 12°C (54°F), and a maximum of 25°C (77°F). Although October has slightly less precipitation at 76 mm (3.0 in) over 13 days, the humidity increases to 89%, making the air feel even more damp. For more detailed information on the October weather, you can check out Brussels weather in October.
August and November present notably different weather patterns. In August, temperatures range from a comfortable 19°C (66°F) on average, peaking at a hot 36°C (97°F), which invites outdoor activities amidst higher humidity levels at 76%. However, it also sees considerable precipitation, with rain occurring on 14 days and totaling around 80 mm (3.2 in). In contrast, November experiences much cooler temperatures, with an average of only 7°C (45°F) and nighttime lows dipping to -2°C (28°F). The month also features a higher humidity level at 92%, while precipitation is lighter at 57 mm (2.2 in) and falls on 11 days. For more detailed insights about the weather during this month, you can check Brussels weather in November.
August and December present contrasting weather patterns. August features temperatures ranging from a minimum of 8°C (46°F) to a scorching maximum of 36°C (97°F), with an average of 19°C (66°F). Though it experiences significant warmth, August is also marked by humidity levels at 76% and 80 mm (3.2 in) of precipitation spread over 14 days. In stark contrast, December's temperatures drop considerably, with a minimum of -5°C (24°F) and an average of just 5°C (42°F), peaking at 15°C (59°F). The month sees higher humidity levels at 92% and slightly more precipitation at 93 mm (3.7 in), occurring over 17 days. For more details on December weather, check out Brussels weather in December.
August in Brussels uniquely blends the warmth of summer with the onset of the cooler autumn season, making it distinct within the year's climate spectrum. With peak temperatures reaching a sweltering 36°C (97°F), this month offers some of the hottest days before the gradual drop in temperature. The average sits pleasantly at 19°C (66°F), allowing for comfortable evenings after the day’s heat. However, humidity levels at 76% can create a muggy atmosphere, while 14 days of rainfall leading to a total of 80 mm of precipitation can introduce a refreshing, albeit unpredictable, twist to outdoor plans. As August transitions to September, the city’s weather becomes increasingly variable, making it essential for visitors and residents alike to prepare for both sunshine and sudden showers. For a deeper dive into Brussels' weather patterns throughout the year, check out the complete guide at Brussels Climate.