December Weather in Grimbergen, Belgium

Last updated: August 21, 2025

December in Grimbergen, Belgium presents a chilly yet captivating winter atmosphere, with average temperatures hovering around 6°C (43°F). Daily highs can reach a mild 15°C (59°F), while nightfall brings a sharp drop to a brisk -4°C (24°F). The month is characterized by frequent rainfall, accumulating to 89 mm (3.5 in) over approximately 16 days, resulting in a humidity level that often exceeds a lofty 92%. This blend of wet and cool conditions marks December as a quintessential winter month, inviting residents and visitors alike to embrace a cozy and festive spirit.

December Temperature in Grimbergen

December in Grimbergen brings a notable chill as winter firmly takes hold. With temperatures ranging from a minimum of -4°C (24°F) to a maximum of 15°C (59°F), the average hovers around 6°C (43°F), indicating a slight dip compared to the preceding months. This month marks the transition from the mild autumn temperatures of November, where the average was 8°C (46°F), to the colder conditions of January. The frosty air enhances the seasonal festivities, inviting both residents and visitors to enjoy the charm of winter while bundled up in cozy attire. As the year closes, Grimbergen's December climate paints a serene portrait of winter's embrace, captivating all who experience it.

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

The chart illustrates December temperature patterns in Grimbergen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grimbergen, 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 Grimbergen generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Grimbergen

December in Grimbergen, Belgium, is characterized by its notably high precipitation, totaling 89 mm (3.5 in), making it the wettest month of the year. This increase in rainfall can be seen in the rise of precipitation days, with 16 rainy days marking a sharp uptick from the preceding months. October, while also wet with 79 mm, had just 13 days of rain, highlighting December's trend toward longer and more frequent downpours. As the year draws to a close, the increased rainfall not only underscores the onset of winter but also signifies a shift from the generally drier autumn months, shaping a distinctive and somewhat gloomy atmosphere typical of Belgium's winter season.

December Precipitation Trends in Grimbergen

The chart displays monthly precipitation patterns in Grimbergen, 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 Grimbergen, December typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec626769385863677351795389
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Grimbergen

In December, Grimbergen, Belgium, experiences a notable humidity level of 92%, consistent with the high rates seen in November. This winter month marks a trend of elevated humidity that has been prominent since October, reflecting the region's chillier climate. As the year draws to a close, the humidity often peaks, marking a departure from the drier summer months, with July and August being the driest at 80% and 76%, respectively. The increase in December's humidity not only signifies the onset of colder weather but also helps to create a serene, atmospheric quality as winter settles in, enveloping Grimbergen in a cozy yet damp embrace.

December Average Humidity in Grimbergen

This chart illustrates the average monthly humidity levels in Grimbergen, 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 Grimbergen 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 Grimbergen

In December, Grimbergen experiences a low UV Index of 1, similar to the start of the year in January and November, indicating minimal sun exposure risk with a typical burn time of 45 minutes. This trend reflects the city's colder months, where the sun’s intensity wanes, leading to extended safe exposure times. Throughout the year, the UV Index in Grimbergen fluctuates: it peaks in the summer months of June and July at 8, characterized as very high, demanding just 15 minutes for potential skin damage. As seasons change, residents notice a gradual decline in UV levels, with moderation in spring and fall. For detailed month-by-month insights, explore more at Grimbergen UV Index.

Maximum UV Index Levels in Grimbergen for December

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

In Grimbergen, Belgium, December showcases a modest 143 hours of sunshine, a notable dip as the year winds down. This decline reflects a broader trend observed throughout the winter months, with daylight hours diminishing significantly from the vibrant summer peak of 411 hours in July. As the seasons shift, December's sunlight is a mere hint of the luminous 397 hours seen in May, highlighting the transition from spring's brightness to the latent hues of winter. Despite the shorter days, these glimmers of sunshine bring a unique charm to Grimbergen during the holiday season, reminding residents and visitors alike that even in the darkest months, light still breaks through.

Monthly Sunshine Duration in Grimbergen: December Highlighted

The December sunshine duration represents the total number of hours Grimbergen 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.
JanFebMarAprMayJunJulAugSepOctNovDec120h203h272h348h397h400h411h383h320h241h191h143h
Data source: Grimbergen December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Grimbergen During December

In Grimbergen, Belgium, December typically ushers in a notable decline in sunshine, with a mere 16% chance of sunny weather. This marks a stark contrast to the early months of the year, where chances of sunshine steadily rise, peaking in April at 48%. Following the burst of brightness in spring, the likelihood begins to wane again as the year draws to a close. The dropping trend is further pronounced moving from November's 22% down to the year's lowest point in December. As winter sets in, residents may need to brace for overcast skies, making those rare sunny days even more cherished.

Percentage of Sunny Days in December in Grimbergen

The chart illustrates the percentage of sunny days in Grimbergen 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 Grimbergen experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec11%31%39%48%33%34%34%30%34%30%23%16%
Data source: Grimbergen December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Grimbergen in December

As the year draws to a close in Grimbergen, Belgium, December greets residents with a modest 7 hours of daylight. This marks the lowest point in the annual cycle, following a gradual decline from the sunniest peak in June, where daylight extends to a glorious 16 hours. The trend is unmistakable: starting from the festive glow of late spring, daylight hours wane progressively through the summer and into the darker winter months. By December, the shortened days invite a cozy embrace of indoor activities, as the community prepares for the festive season amidst the twinkling lights that brighten the long nights.

Average Daylight Hours in Grimbergen for December

The chart illustrates the variation in daylight duration in Grimbergen throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 28m10h11h 55m13h 52m15h 34m16h 27m15h 59m14h 27m12h 34m10h 38m8h 54m7h 58m
Data source: Grimbergen daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Grimbergen

As December sweeps into Grimbergen, Belgium, the winds pick up slightly, with an average speed of 4.0 m/s (9 mph), showcasing a subtle increase compared to the calmer November. This trend reflects the overall pattern observed throughout the year, where gusts typically fluctuate, peaking in the winter months. Notably, the spring months often experience the lightest breezes, dipping to around 3.4 m/s (8 mph) in April. As we transition toward winter, the winds tend to gather strength, ushering in the chill of the season. December’s brisk breezes echo the lively shifts seen earlier in the year, balancing the calm of summer with the invigorating chill of winter, making it a characteristically dynamic month for the region.

Average December Wind Speed in Grimbergen

The chart displays monthly wind speed patterns in Grimbergen, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.34.43.93.44.22.83.23.33.04.23.24.0 m/s
Data source: Grimbergen December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Grimbergen Compares to Other Months

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

In December, temperatures vary more dramatically, ranging from a minimum of -4°C (24°F) to a maximum of 15°C (59°F), with an average of 6°C (43°F). The month sees significant rainfall, with 89 mm (3.5 in) of precipitation over 16 days and a high humidity level of 92%. In contrast, January is slightly colder, with temperatures dipping to a minimum of -6°C (21°F) and an average of 4°C (40°F), while the maximum reaches 14°C (58°F). Precipitation decreases to 62 mm (2.4 in) over 12 days, and humidity is slightly lower at 91%. For more detailed insights on January weather, you can refer to Grimbergen weather in January.

December and February exhibit notable similarities and differences in weather patterns. In December, temperatures range from a minimum of -4°C (24°F) to a maximum of 15°C (59°F), while February sees a wider temperature spread, with lows dropping to -12°C (11°F) and highs reaching 19°C (66°F). Precipitation is more frequent in December, averaging 89 mm (3.5 in) over 16 days compared to February's 67 mm (2.6 in) over just 12 days. Despite these contrasts, both months maintain a relatively high humidity level, around 92% in December and 89% in February. For a detailed look at February's weather specifics, you can visit Grimbergen weather in February.

December and March present contrasting weather patterns. In December, temperatures range from a chilly -4°C (24°F) to a mild 15°C (59°F), with an average of 6°C (43°F). The month is marked by high humidity at 92% and considerable precipitation, totaling 89 mm (3.5 in) over 16 days. In comparison, March shows a slight uptick in average temperatures, with lows of -7°C (19°F) and highs reaching up to 23°C (73°F), averaging around 7°C (46°F). Precipitation decreases to 69 mm (2.7 in) over 14 days, and humidity also dips slightly to 87%. For more specific insights about the weather in Grimbergen during March, you can visit Grimbergen weather in March.

December and April present quite different weather conditions. In December, temperatures range from a chilly -4°C (24°F) to a comfortable 15°C (59°F), with an average of 6°C (43°F). This month sees significant precipitation, totaling 89 mm (3.5 in) over about 16 days, along with high humidity at 92%. In contrast, April offers milder temperatures, with a minimum of -3°C (26°F) and a maximum soaring to 27°C (81°F), averaging 10°C (51°F). Rain is less frequent during this month, with only 38 mm (1.5 in) of precipitation over 8 days, and the humidity sits at a comparatively lower 85%. For a more detailed look at April weather specifics, you can visit Grimbergen weather in April.

December and May present strikingly different weather patterns. In December, temperatures range from a chilly -4°C (24°F) at night to a maximum of 15°C (59°F) during the day, with an average temperature of 6°C (43°F). The month tends to be quite wet, with 89 mm (3.5 in) of precipitation spread over about 16 days, and the air is notably humid at 92%. In contrast, May experiences warmer conditions, with temperatures ranging from a mild 1°C (35°F) at night to a balmy 31°C (88°F) during the day, leading to an average of 14°C (57°F). Precipitation is lower at 58 mm (2.3 in) over 12 days, and humidity decreases slightly to 82%. For a more detailed look at May weather, you can visit Grimbergen weather in May.

December and June present starkly contrasting weather patterns. In December, temperatures can plunge to a minimum of -4°C (24°F), with averages around 6°C (43°F) and a maximum of only 15°C (59°F), coupled with high humidity at 92%. The month also sees substantial precipitation, with 89 mm (3.5 in) falling over 16 days. In contrast, June enjoys milder conditions, with minimums at 8°C (46°F), average temperatures of 18°C (65°F), and highs reaching up to 32°C (91°F). Precipitation during June is lower at 63 mm (2.5 in) across 9 days, and humidity drops slightly to 82%. This marked difference highlights June's warmer and drier climate compared to December's chilly and wet tendencies. For more detailed insights, you can check the Grimbergen weather in June.

Comparing the weather in December and July reveals notable differences in temperature and precipitation. In December, temperatures range from a chilly minimum of -4°C (24°F) to a mild maximum of 15°C (59°F), with an average of 6°C (43°F). The month experiences significant humidity at 92% and an average of 89 mm (3.5 in) of precipitation over 16 days. In contrast, July offers a much warmer climate, with temperatures ranging from a minimum of 8°C (47°F) to a scorching maximum of 39°C (102°F), averaging around 19°C (67°F). Although July sees lower precipitation at 67 mm (2.6 in) over 11 days, the humidity is slightly lower at 80%. For a more detailed look at July’s weather, you can check Grimbergen weather in July.

In December, temperatures range from a chilly minimum of -4°C (24°F) to a mild maximum of 15°C (59°F), with an average around 6°C (43°F). The month is characterized by high humidity levels at 92% and frequent precipitation, seeing rain or snow on 16 days, totaling 89 mm (3.5 in). In contrast, August enjoys significantly warmer conditions, with a minimum temperature of 8°C (47°F) and highs reaching up to 35°C (96°F), averaging 19°C (66°F). The summer month has lower humidity at 76% and slightly less precipitation, amounting to 73 mm (2.9 in) over 14 days. For a closer look at what to expect during this vibrant summer month, check out Grimbergen weather in August.

In December, temperatures typically range from a minimum of -4°C (24°F) to a maximum of 15°C (59°F), with an average temperature of 6°C (43°F). This winter month also experiences considerable precipitation, averaging 89 mm (3.5 in) over 16 days, coupled with high humidity levels of 92%. In contrast, September boasts a much milder climate, with temperatures varying from a minimum of 4°C (40°F) to a maximum of 33°C (91°F) and an average of 16°C (60°F). The rainfall in September is significantly less, at 50 mm (2.0 in) over only 9 days, and humidity is slightly lower at 82%. For more details about the weather in September, you can visit Grimbergen weather in September.

In comparing the weather between December and October, December tends to be colder, with temperatures ranging from a minimum of -4°C (24°F) to an average of 6°C (43°F) and a maximum of 15°C (59°F). In contrast, October is milder, experiencing minimum temperatures of 2°C (35°F) and reaching daytime highs of 25°C (78°F), with an average of 13°C (55°F). Precipitation is slightly higher in December at 89 mm (3.5 in), occurring over 16 days, compared to October’s 79 mm (3.1 in) over 13 days. Additionally, December's humidity is higher at 92%, while October remains at a lower 89%. For more specific information on October's weather patterns, check out Grimbergen weather in October.

In December, the weather tends to be colder than in November, with minimum temperatures dipping to -4°C (24°F) compared to November's -2°C (28°F). The average temperature in December is 6°C (43°F), while November enjoys a slightly warmer average of 8°C (46°F). Max temperatures also drop in December, peaking at 15°C (59°F) versus November's 19°C (66°F). In terms of precipitation, December sees a significant increase with 89 mm (3.5 in) over 16 days, compared to November's 53 mm (2.1 in) over just 11 days. Both months have high humidity levels at 92%. For more specific details about November weather, you can check Grimbergen weather in November.

Compare Grimbergen's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Grimbergen

As December settles in Grimbergen, the weather takes a noticeable turn, characterized by cooler temperatures and increased humidity. The month boasts a blend of chilly days and more frequent rainfall, with a total of 89 mm across approximately 16 days, leading to a generally damp atmosphere. While the average temperature hovers around 6°C, it can dip to -4°C at times, starkly contrasting with the milder months preceding it. This shift provides a cozy yet somewhat brisk experience, inviting locals and visitors alike to embrace the festive spirit. To learn more about the overall climate in Grimbergen, explore Grimbergen Climate.