December Weather in Aalst, Belgium

Last updated: August 21, 2025

In December, Aalst, Belgium experiences a distinct winter climate characterized by cool temperatures. The month's maximum temperature peaks at around 15°C (59°F), while the average settles at a brisk 6°C (43°F), dipping to a chilly minimum of -4°C (25°F). Rain is frequent, with 16 days recording precipitation, leading to a total of 89 mm (3.5 inches) of moisture. With humidity levels soaring at 92%, residents and visitors alike feel the seasonal chill, making it a typical, albeit damp, December in this charming Belgian town.

December Temperature in Aalst

In Aalst, Belgium, December ushers in a chill as winter settles over the region. With temperatures ranging from a brisk -4°C (25°F) at night to a maximum of 15°C (59°F) during the day, this month marks a transition from the somewhat milder conditions of November. The average temperature of 6°C (43°F) reflects a steady drop as the year draws to a close, aligning with the shifting seasons. Compared to the warmer months earlier in the year, such as July and August that peak at nearly 39°C (102°F), December offers a much cooler embrace, creating a cozy atmosphere perfect for enjoying festive gatherings. As sunlight wanes and nights lengthen, Aalst’s December weather sets a serene backdrop for winter festivities, inviting residents and visitors alike to embrace the charm of the season.

December Weather in Aalst: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Aalst, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Aalst, December typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec404245505765666660554642
Data source: Temperature data for Aalst generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Aalst

December in Aalst, Belgium, ushers in a noticeable increase in precipitation, with an average of 89 mm (3.5 in) falling over the month—a peak for the year. This spike accompanies a rise in the number of rainy days, totaling 16, which can feel particularly damp and chilly. The transition from November's 53 mm and 12 days of rainfall to December's increased wetness sets the stage for a wintery atmosphere. Interestingly, the trend of higher precipitation through the latter months suggests that while summer may see more frequent showers, it’s the depths of winter where Aalst experiences its most substantial rainfall, enveloping the city in a cloak of grey and moisture as the year draws to a close.

December Precipitation Trends in Aalst

The chart displays monthly precipitation patterns in Aalst, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Aalst, December typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec626569396063667352815389
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Aalst

As the year draws to a close in Aalst, Belgium, December ushers in notable humidity levels, peaking at 92%, which mirrors the high moisture seen in November. This consistent humidity signals a distinctly damp winter atmosphere, as the region flirts with the upper echelons of its annual moisture index. Notably, the months leading up to December exhibit a gradual decline from the summer's more moderate levels, with humidity dipping to its lowest point in August at 76%. However, as the temperature cools, the return to more humid conditions not only underscores the seasonal shift but also prepares the landscape for the chill of winter, firmly establishing December as one of the most humid months in Aalst.

December Average Humidity in Aalst

This chart illustrates the average monthly humidity levels in Aalst, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Aalst is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%87%85%82%82%80%76%82%89%92%92%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Aalst

As the year draws to a close in Aalst, Belgium, December sees a significant decrease in UV exposure, mirroring the trends set by previous winter months. With a UV Index of just 1, the exposure category remains in the low range, allowing residents to enjoy a generous burn time of 45 minutes without the risk of sunburn. This pattern follows November's similar low UV Index, indicating a period of minimal sun intensity and safe outdoor activities. As daylight hours shorten and temperatures drop, it's a perfect time to embrace the outdoors while taking advantage of the low UV level. For more detailed insights on UV exposure throughout the year, check out the complete Aalst UV Index.

Maximum UV Index Levels in Aalst for December

The chart shows the monthly maximum UV Index (UVI) for Aalst in December, 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 December, the maximum UV index in Aalst typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875321
Data source: Aalst December 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.

December Sunshine in Aalst

In Aalst, Belgium, the sunshine begins to wane as December arrives, basking the city in just 149 hours of sunlight. This marks a notable decrease from the vibrant 407 hours experienced in June, as the days shorten and the winter chill sets in. The trend throughout the year showcases a gradual increase in daylight, peaking in mid-summer, with a compelling 400 hours in May, just as spring blooms into life. As autumn leaves fall and the year draws to a close, the sunlight in December stands in stark contrast to the 274 hours of March, reminiscent of a seasonal journey from bright and lively days to a serene, introspective winter. Embracing this seasonal shift, Aalst reveals its charm in the soft glow of its winter sun, inviting residents and visitors alike to appreciate the beauty of a quieter, sun-dappled December.

Monthly Sunshine Duration in Aalst: December Highlighted

The December sunshine duration represents the total number of hours Aalst experiences direct sunlight during the month of December, excluding cloudy or obstructed periods. This chart compares the sunshine duration of December with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec120h204h274h351h400h407h415h386h323h243h196h149h
Data source: Aalst December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Aalst During December

In Aalst, Belgium, the likelihood of experiencing sunny weather in December hovers at a modest 15%, which marks a notable decline as we head into the winter months. This trend highlights a stark contrast to the brighter days of early spring, where chances soar to 39% in March and peak at 48% in April. As the year progresses into late fall, the chance of sunshine diminishes significantly, dropping from 22% in November. December's brisk chill and shorter daylight hours leave little room for sunny interludes, making each ray of sun a rare and cherished sight as the festive season unfolds.

Percentage of Sunny Days in December in Aalst

The chart illustrates the percentage of sunny days in Aalst throughout the year, with December highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Aalst experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec12%30%39%48%34%34%34%31%34%30%22%15%
Data source: Aalst December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Aalst in December

As December wraps its chilly embrace around Aalst, Belgium, daylight dwindles back to 8 hours, a familiar return to the shorter days of late autumn. This month's light mirrors January's, creating a seasonal rhythm where sunlight reaches its annual low. As we journey through the year, we witness a steady climb in daylight hours from the stark 10 hours in February to the peak of 16 hours in June, before the gradual decline resumes in the fall. Each month unfolds a symphony of increasing and decreasing light, with the longest days giving way to weeks of cozy nights. This cyclical dance of daylight not only marks the passage of time but also reminds us of the comforting predictability of nature's patterns.

Average Daylight Hours in Aalst for December

The chart illustrates the variation in daylight duration in Aalst throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 29m10h 1m11h 55m13h 51m15h 32m16h 25m15h 57m14h 26m12h 34m10h 38m8h 55m8h
Data source: Aalst daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Aalst

As December settles over Aalst, Belgium, the wind begins to pick up pace, averaging 4.0 m/s (9 mph), a slight dip from the higher winds of earlier months but still robust enough to envelop the town in a brisk chill. This month, like October, showcases a revitalizing shift as temperatures drop and the air turns crisp, prompting cozy gatherings and warm beverages. Compared to the gentler breezes of summer, December’s winds bring a refreshing reminder of winter's approach. Notably, the consistent wind speeds throughout the year hint at a unique stability, with the cold months exhibiting a tendency for slightly stronger gusts, suggesting a comforting predictability in Aalst's seasonal rhythms.

Average December Wind Speed in Aalst

The chart displays monthly wind speed patterns in Aalst, with values for each month shown alongside December's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how December's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec4.24.43.93.54.22.83.23.43.04.23.24.0 m/s
Data source: Aalst December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Aalst Compares to Other Months

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

December and January both feature chilly temperatures, but January typically sees slightly lower averages. In December, temperatures range from a minimum of -4°C (25°F) to a maximum of 15°C (59°F), with an average of 6°C (43°F). Precipitation is relatively high, with 89 mm (3.5 in) occurring over 16 days, resulting in a humidity level of 92%. In contrast, January experiences a slight dip in temperature, with minimums reaching -6°C (21°F) and an average temperature of 4°C (40°F), peaking at 14°C (58°F). Additionally, January is less wet, with only 62 mm (2.5 in) over 12 days and a humidity of 91%. For more details on the winter weather, check out Aalst weather in January.

December and February in Aalst reveal contrasting winter weather patterns. In December, temperatures range from a chilly -4°C (25°F) to a milder 15°C (59°F), with an average of 6°C (43°F). This month experiences significant precipitation, totaling 89 mm (3.5 in) over 16 days, and a high humidity level of 92%. In contrast, February sees a drop in minimum temperatures, with lows reaching -11°C (13°F), though it can still peak at 18°C (65°F) on the warmer days, maintaining an average of 6°C (42°F). Precipitation decreases to 65 mm (2.6 in) spread over 12 days, accompanied by slightly lower humidity at 89%. For more detailed information, check Aalst weather in February.

In December, temperatures range from a minimum of -4°C (25°F) to a maximum of 15°C (59°F), with an average around 6°C (43°F). The month is characterized by high humidity at 92% and a substantial amount of precipitation, totaling 89 mm (3.5 inches) over 16 days. In contrast, March exhibits slightly colder temperatures, with a minimum of -7°C (19°F) and a maximum of 23°C (73°F), averaging 7°C (46°F). The month sees reduced precipitation at 68 mm (2.7 inches) spread over 14 days and slightly lower humidity levels at 87%. For more detailed information, you can check out the Aalst weather in March.

In comparing the weather of December and April, it's evident that temperatures begin to rise significantly as spring approaches. December sees average temperatures around 6°C (43°F), with a range from a chilly -4°C (25°F) to a milder 15°C (59°F). In contrast, April experiences warmer average temperatures of 10°C (51°F), with highs reaching up to 27°C (80°F).

Precipitation levels also differ notably; December averages 89 mm (3.5 in) over 16 days, while April sees just 39 mm (1.5 in) across 9 days, indicating a clearer shift towards drier conditions. Furthermore, humidity levels are slightly lower in April at 85% compared to December's humid 92%. For more specific details on how weather changes in April, you can visit Aalst weather in April.

In December, the weather is notably colder, with temperatures ranging from a minimum of -4°C (25°F) to a maximum of 15°C (59°F), and an average of 6°C (43°F). The month is characterized by high humidity at 92% and frequent precipitation, with rain or snow occurring on about 16 days and totaling 89 mm (3.5 in). In contrast, May brings a much milder climate; temperatures range from a minimum of 1°C (34°F) to a maximum of 30°C (87°F), with an average of 14°C (57°F). While May still sees precipitation, it is less severe with only 59 mm (2.3 in) over 12 days, and humidity is slightly lower at 82%. For a detailed look at how the weather unfolds in May, you can check out Aalst weather in May.

December and June present strikingly different weather conditions. December often features a chilly climate, with temperatures ranging from a minimum of -4°C (25°F) to a maximum of 15°C (59°F), averaging around 6°C (43°F). This month also sees significant precipitation, totaling 89 mm (3.5 in) over approximately 16 days, accompanied by high humidity levels at 92%. In contrast, June delivers a much warmer experience, with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 32°C (91°F), averaging 18°C (65°F). Rainfall is less frequent in June, with only 63 mm (2.5 in) spread over about 9 days and slightly lower humidity at 82%. For more details on June weather, you can check Aalst weather in June.

December and July present stark contrasts in weather conditions. In December, temperatures range from a chilly -4°C (25°F) to a mild maximum of 15°C (59°F), with an average of 6°C (43°F). The month experiences considerable precipitation of 89 mm (3.5 in) over 16 days, accompanied by a high humidity level of 92%. In contrast, July boasts a much warmer temperature spectrum, with minimums around 8°C (47°F) and soaring highs that can reach 39°C (102°F), averaging 19°C (66°F). While July has less precipitation at 66 mm (2.6 in) over just 11 days, the humidity is lower at 80%. These differences highlight the seasonal extremes in Aalst's climate. For more details, visit Aalst weather in July.

December and August present contrasting weather patterns, reflecting the seasonal shifts. In December, temperatures range from a chilly -4°C (25°F) at night to a mild 15°C (59°F) during the day, with an average of 6°C (43°F). The month is characterized by high humidity at 92% and substantial precipitation, totaling 89 mm (3.5 in) over 16 days. In stark contrast, August features much warmer weather, with temperatures varying from a minimum of 8°C (47°F) to a scorching maximum of 35°C (96°F) and an average of 19°C (66°F). Precipitation is lower at 73 mm (2.9 in) across 13 days, and humidity stands at a comfortable 76%. For more details, you can check Aalst weather in August.

In December, temperatures tend to be much cooler, with a minimum of -4°C (25°F) and an average of 6°C (43°F), compared to September's milder range, where the minimum is 4°C (40°F) and the average reaches 16°C (60°F). While December experiences higher humidity at 92% and more frequent precipitation, totaling 89 mm (3.5 in) over 16 days, September offers a drier climate, with only 52 mm (2.1 in) of rain over 9 days and a humidity of 82%. This stark contrast illustrates the transition from the warm, often sunny days of September to the chilly, damp conditions of December. For a closer look at September's weather, check out Aalst weather in September.

In December, the weather is notably colder compared to October, with temperatures ranging from a minimum of -4°C (25°F) to a maximum of 15°C (59°F), while October experiences a milder range from 2°C (36°F) to 25°C (77°F). Precipitation levels are slightly higher in December, with 89 mm (3.5 in) falling over 16 days, compared to October's 81 mm (3.2 in) across 13 days. Additionally, December tends to be more humid, boasting a humidity level of 92% compared to October's 89%. For a more detailed understanding of October's climate, you can explore Aalst weather in October.

December presents a notable shift in weather compared to November. While November enjoys slightly milder temperatures with an average high of 19°C (66°F) and lows of -2°C (29°F), December sees a cooler range with averages between -4°C (25°F) and a maximum of 15°C (59°F). Additionally, December experiences increased precipitation, accumulating 89 mm (3.5 in) over 16 days, compared to November's 53 mm (2.1 in) over just 12 days. Despite both months having a consistent humidity level of 92%, December’s overall chilliness and wetter conditions make it feel significantly different. For more information, you can check Aalst weather in November.

Compare Aalst's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Aalst

As December unfolds in Aalst, the weather transitions distinctly from the milder months, bringing chillier temperatures and an increase in precipitation. With average highs around 6°C and nighttime lows dipping to -4°C, residents experience a notable drop compared to the preceding autumn. The month also welcomes a significant humidity level of 92%, creating a damp atmosphere that feels even colder. December sees about 16 days of rainfall, contributing to a total of 89 mm of precipitation, making it one of the wetter months in the year. This seasonal shift not only transforms the landscape but also invites locals and visitors to embrace the cozy charm of winter. For a deeper dive into what to expect throughout the year, check out Aalst Climate.