Climate and monthly weather forecast
Aalst, Belgium

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The climate of Aalst

Nested in Belgium, Aalst experiences a predominantly Marine West Coast climate, warm summer, designated by Köppen as Cfb. This climate variation is marked by moderate temperature swings throughout the year, interspersed with varying amounts of precipitation.

Weather conditions in Aalst display distinct fluctuations across different months. The city witnesses highest temperatures ranging from 5.5°C (41.9°F) to 23.3°C (73.9°F) and lowest temperatures fluctuating from 1.3°C (34.3°F) to 13.8°C (56.8°F). Comparative to other regions, Aalst's temperature variations are moderate, owing to its geographical position.

Rainfall across all months oscillates between 18mm (0.71") and 59mm (2.32"), with indications of rainfall days between 9.8 days to 17.9 days. Interestingly, snowfall is not a common occurrence in Aalst, except in the months of March and December where it reaches up to 36mm (1.42") and 27mm (1.06") respectively, making these months unique in their own right.

The best time to visit Aalst

Guided by the available weather parameters, the ideal time to visit Aalst would be during the summer months, between June and August. During this period, the city experiences the warmest temperatures averaging from 21.2°C (70.2°F) to 23.2°C (73.8°F). Visitors can also expect extended daylight hours, ranging from 16.4 hours to 16 hours, providing ample opportunity to explore and enjoy the city.

Notably, this period registers the highest UV index at 5. To top it all, during these months, the probability of rainfall is comparatively lower with values between 23mm (0.91") to 32mm (1.26").

The worst time to visit Aalst

For those not partial to cold weather and diminished daylight hours, January may not be the prime time for a visit. With the lowest temperature ranging from 5.5°C (41.9°F) to 1.3°C (34.3°F) and daylight hours reduced to merely 8.5 hours, exploring Aalst in January could be a challenge.

Rainfall also sees a substantial increase during this time, peaking to 45mm (1.77") with around 16.7 rainfall days making January one of the least desirable months to visit.

Spring weather in Aalst

The spring season in Aalst, from March to May, ushers in a gradual rise in temperature. With an average high of 15.4°C (59.7°F) in May and comparatively less rainfall from 43mm (1.69") to 29mm (1.14"), springtime becomes a pleasant period to witness the city's charm.

Summer weather in Aalst

Summer months in Aalst bring temperatures averaging between 17.9°C (64.2°F) in May and 23.2°C (73.8°F) in August. Evenings remain pleasantly cool with a drop in temperature from 13.6°C (56.5°F) in July to 13.8°C (56.8°F) in August. Besides, Aalst notes an increase in hours of sunlight, which peaks at 16.4 hours in June.

Autumn weather in Aalst

With the onset of autumn, the climate of Aalst transitions to cooler temperatures, diminishing sunlight hours, and a rise in rainfall. The months from September to November see temperatures fall steadily from a high of 19.8°C (67.6°F) to a low of 10°C (50°F). Rainfall during this period increases progressively from 21mm (0.83") to 44mm (1.73"), indicating more wet days.

Winter weather in Aalst

Aalst enters its winter season from December, with temperatures taking a chilly turn marking a significant low of 1.3°C (34.3°F) in January. A highlight of winter in Aalst is the snowfall, unique to this period, with a notable peak of 36mm (1.42") in December. Daylight hours also take a dip, averaging 8 hours, providing fewer hours for outdoor activities.

Weather in January

January in Aalst, Belgium sees brisk and damp conditions. Snowfall of 36mm (1.42") typically distributed over 3.9 days adds a chilly essence to the cityscape. This commences the year with adverse weather for outdoor activities. Amid frequent showers and chilling temperature, getting sunlight becomes an occasional luxury. Weather in January »

Weather in February

The Aalst weather in February retains the slant of the wintry January conditions, with minor improvements in visibility and daylight. Yet, with an average temperature range from 1.5°C (34.7°F) to 6.8°C (44.2°F), February remains one of the coldest months. Weather in February »

Weather in March

March marks a transition towards warmer and dryer conditions in Aalst. The doubling of daylight hours from January to March escalates outdoor activities. Absence of snow, moderating temperatures, and extended sunlight imply the arrival of spring. Weather in March »

Weather in April

Proceeding to April, the Aalst weather continues to wax warmer from 3.3°C (37.9°F) to 15.4°C (59.7°F), fostering fresher and extended outdoor moments. Showers are scarce this month, with rainfall dipping to its yearly minimum of 18mm (0.71"). Weather in April »

Weather in May

Entering into May, Aalst paves the way for summer, with temperature brackets edging up to 8.3°C (46.9°F) from 17.9°C (64.2°F). Weather patterns gradually tilt towards warmer conditions, inviting more sunbathing opportunities. The increase in relative humidity prompts some discomfort, despite falling short of peak levels. Weather in May »

Weather in June

June embodies the typical summer temperament in Aalst, albeit the temperature limits are yet to touch the 23.3°C (73.9°F) peak of July. As the city basks in the longest daylight hours of the year, outdoor enthusiasts make the best of this period. Weather in June »

Weather in July

Aalst steps into its warmest period in July, as temperatures leap to a high of 23.3°C (73.9°F). This epitomises the height of summer, with citizens engaging in water sports and other outdoor recreations. With the substantial sunlight, UV levels touch a peak value of five, calling for sunscreen applications in the afternoon. Weather in July »

Weather in August

August in Aalst continues to bask in the summer heat, with temperatures almost identical to July's. As August progresses, days start to shorten, signifying the closing phase of summer. The UV index remains at a peak of five, necessitating sun protection routines. Weather in August »

Weather in September

In September, Aalst experiences a slight drop in temperatures, marking the arrival of Autumn. The weather transformation ushers falling leaves and cooler winds into the city. Despite the contract in daylight hours, outdoor events proceed without interruption. Weather in September »

Weather in October

October carries forward the autumn chill in Aalst, enticing tourists with the changing foliage. The common weather scenario remains cool and comfortable. Deviating from the previous month, October witnesses a rise in rainfall to 31mm (1.22"), co-existing with the increased cloud percentage. Weather in October »

Weather in November

In November, temperatures in Aalst continue to dip, instigating the transition from autumn to winter. The weather progresses towards cooler conditions, preparing citizens for frosts and snow. Humidity ascends rapidly, causing a dampness in the air that characterizes impending winters. Weather in November »

Weather in December

December ushers in a typical winter scenario in Aalst, Belgium as temperatures range from 2.8°C (37°F) to 6.6°C (43.9°F). This marks the onset of the vacation season, fascinating tourists with a snow-covered townscape. The weather remains cold and damp, while extended nights contribute to a rather wintry atmosphere. Weather in December »
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Frequently asked questions

What month is the coldest in Aalst?

In Aalst, January records the average lowest temperatures, peaking at 5.5°C (41.9°F) and reaching a low of 1.3°C (34.3°F).

How many days does it rain in Aalst?

In Aalst, during the entire year, the rain falls for 169.4 days and collects up to 421mm (16.57") of precipitation.

When does it snow in Aalst?

January through March, November and December are months with snowfall in Aalst, Belgium.

When does it snow the most in Aalst?

January is the month with the most snowfall in Aalst, Belgium. Snow falls for 3.9 days and accumulates 36mm (1.42") of snow.

How much does it snow in Aalst?

In Aalst, during the entire year, snow falls for 12.5 days and aggregates up to 107mm (4.21") of snow.

When is the lowest UV index in Aalst?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

What are the least humid months in Aalst?

April, July and August, with an average relative humidity of 75%, are the least humid months.

What is the driest month in Aalst?

April is the month with the least rainfall in Aalst, Belgium. Rain falls for 12.5 days and accumulates 18mm (0.71") of precipitation.

When it does not snow in Aalst?

April through October are months without snowfall in Aalst.

When are the longest days in Aalst?

The month with the longest days in Aalst, Belgium, is June, with an average of 16h and 30min of daylight.

What month has the most sunshine in Aalst?

With an average of 9.1h of sunshine, June has the most sunshine of the year.

What is the month with the highest UV index in Aalst?

The months with the highest UV index in Aalst, Belgium, are June through August, with an average maximum UV index of 5.

What month is the hottest in Aalst?

July is the warmest month in Aalst, with the temperature often reaching an average high of 23.3°C (73.9°F) and an average low of 13.6°C (56.5°F).

When is Daylight Saving Time (DST) in Aalst?

On Sunday, 27. October 2024, at 03:00, Daylight Saving Time ends, and the time zone changes from CEST to CET. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 02:00, and the time zone reverts from CET to CEST.

What is the most humid month in Aalst?

December is the most humid month in Aalst, Belgium, with an average relative humidity of 88%.

What is the rainiest month in Aalst?

The month with the most rainfall is December, when the rain falls for 17.9 days and typically aggregates up to 59mm (2.32") of precipitation.

What is the month with the shortest days in Aalst?

The month with the shortest days is December, with an average of 8h and 0min of daylight.

What is the month with the least sunshine in Aalst?

December has the least sunshine of the year, with an average of 3.5h of sunshine.

Average pressure
Aalst, Belgium

Average pressure - Aalst, Belgium

The month with the highest atmospheric pressure is September (1017.3mbar).
The month with the lowest atmospheric pressure is November (1012.2mbar).

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Average wind speed
Aalst, Belgium

Average wind speed - Aalst, Belgium

The windiest month (with the highest average wind speed) is December (17.3km/h).
The calmest month (with the lowest average wind speed) is August (11.7km/h).

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Average humidity
Aalst, Belgium

Average humidity - Aalst, Belgium

The month with the highest relative humidity is December (88%).
The months with the lowest relative humidity are April, July and August (75%).

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Average rainfall
Aalst, Belgium

Average rainfall - Aalst, Belgium

The wettest month (with the highest rainfall) is December (59mm).
The driest month (with the least rainfall) is April (18mm).

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Average rainfall days
Aalst, Belgium

Average rainfall days - Aalst, Belgium

The month with the highest number of rainy days is December (17.9 days).
The month with the least rainy days is September (9.8 days).

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Average snowfall
Aalst, Belgium

Average snowfall - Aalst, Belgium

The month with the highest snowfall is January (36mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).

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Average snowfall days
Aalst, Belgium

Average snowfall days - Aalst, Belgium

The month with the highest number of snowfall days is February (4.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight / Average sunshine
Aalst, Belgium

Average daylight / Average sunshine - Aalst, Belgium

The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 8h and 0min).

The month with the most sunshine is June (Average sunshine: 9h and 6min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).

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Average sunshine days
Aalst, Belgium

Average sunshine days - Aalst, Belgium

The month with the most sunshine days is September (18.7 days).
The month with the least sunshine days is February (8.8 days).

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Average UV index
Aalst, Belgium

Average UV index - Aalst, Belgium

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average visibility
Aalst, Belgium

Average visibility - Aalst, Belgium

The months with the highest visibility are February, March, April, May, June, July, August, September and October (9km).
The months with the lowest visibility are January, November and December (8km).

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Aalst, Belgium

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