December Weather in Waterloo, Belgium

Last updated: August 21, 2025

In December, Waterloo, Belgium experiences a captivating winter landscape characterized by a maximum temperature of 15°C (59°F) and an average of 5°C (42°F), while dipping to a minimum of -4°C (24°F). This month is notably marked by 92 mm (3.6 in) of precipitation spread over 17 days, creating a damp, yet beautiful environment. With humidity levels soaring to 92%, the air often feels crisp and invigorating, making it an intriguing time for visitors to explore the historical charm of the area, albeit with an umbrella in hand.

December Temperature in Waterloo

In December, Waterloo, Belgium begins to embrace the chill of winter, with temperatures dipping to a minimum of -4°C (24°F). The average temperature settles around 5°C (42°F), providing a brisk, frosty atmosphere perfect for winter activities. Despite the cold, daytime highs can reach up to 15°C (59°F), offering occasional mild spells that break the winter's grasp. This month marks a transition as temperatures trend downward from the milder autumn, reflecting the shift towards the heart of winter. With festive cheer in the air and a picturesque landscape, December in Waterloo invites both locals and visitors to enjoy the season’s cozy charm.

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

The chart illustrates December temperature patterns in Waterloo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Waterloo, 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).
JanFebMarAprMayJunJulAugSepOctNovDec394145505664666660544542
Data source: Temperature data for Waterloo 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 Waterloo

In December, Waterloo experiences a significant uptick in precipitation, with an average of 92 mm (3.6 in), making it the wettest month of the year. This increase is accompanied by a higher number of precipitation days, totaling 17, which reflects a trend of wetter conditions as winter sets in. In contrast to the drier spring months of April and May, where rainfall can dip below 60 mm, December’s weather can feel relentless, yet it brings with it the cozy charm of the holiday season. The steady precipitation lays the groundwork for a picturesque winter landscape, highlighting the seasonal shift as temperatures drop and the atmosphere becomes distinctly festive.

December Precipitation Trends in Waterloo

The chart displays monthly precipitation patterns in Waterloo, 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 Waterloo, December typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec657071376072748458785892
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Waterloo

In Waterloo, Belgium, December sees the arrival of higher humidity levels, maintaining a notable 92% that is consistent with the trends from the preceding months. As the year draws to a close, the humidity spikes significantly, matching November's levels. This increase follows a gradual decline from the summer months, where humidity dropped to a comfortable 76% in August. The shift back to elevated moisture levels reflects the transition from winter's crisp chill to the damp, overcast days common in December. As the air grows heavier, residents can expect a cozy yet humid atmosphere—a hallmark of late fall moving into winter.

December Average Humidity in Waterloo

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

In Waterloo, Belgium, the UV Index experiences a steady decline as winter approaches, reaching its lowest point in December with a UV Index of 1. This reflects a low exposure category, meaning that residents can safely enjoy the outdoors with minimal concern for sunburn, as the burn time extends to an impressive 45 minutes. The trend from the previous months highlights a noticeable drop from the moderate to high levels seen in the spring and summer, where the UV Index peaked at 8 during the height of summer in June and July. While the UV levels are currently mild, maintaining awareness of changing sunlight conditions is essential for all outdoor activities. For more detailed information, visit the Waterloo UV Index.

Maximum UV Index Levels in Waterloo for December

The chart shows the monthly maximum UV Index (UVI) for Waterloo 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 Waterloo typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875421
Data source: Waterloo 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 Waterloo

December in Waterloo, Belgium, brings a gentle reprieve from the vibrant summer months, as the sunshine hours are notably reduced to 143 hours. While this is a drop from the preceding months, it's intriguing to observe how the year unfolds—a steady climb from 121 hours in January, peaking in the summer with 406 hours in July before beginning a graceful descent. Each month's transition reveals a rhythmic, predictable pattern, where vibrant growth in sunlight during late spring and summer gives way to a subdued but cozy brightness in December. This cyclic nature of sunlight, with December marking the lowest point, sets the stage for the renewed hope of longer days ahead.

Monthly Sunshine Duration in Waterloo: December Highlighted

The December sunshine duration represents the total number of hours Waterloo 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.
JanFebMarAprMayJunJulAugSepOctNovDec121h200h266h346h394h398h406h379h319h240h190h143h
Data source: Waterloo December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Waterloo During December

In Waterloo, Belgium, the chance of experiencing sunny weather sees a marked decline as the year winds down, with December boasting a modest 16% likelihood of sunshine. This trend highlights a noticeable pattern: as the winter months approach, days grow shorter and cloud cover becomes more prevalent. While the early months of the year gradually increase in sunshine, reaching their peak in April at 49%, the transition into late autumn shows a consistent downward shift—November's 24% drops further into December's gloom. For those hoping for sunny spells during the festive season, it's wise to prepare for the more typical, overcast days that December brings.

Percentage of Sunny Days in December in Waterloo

The chart illustrates the percentage of sunny days in Waterloo 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 Waterloo experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec10%31%39%49%33%33%33%29%36%31%24%16%
Data source: Waterloo December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Waterloo in December

In Waterloo, Belgium, the changing daylight hours throughout the year reveal a fascinating rhythm of the seasons. December sees daylight lingering for only 8 hours, mirroring the shorter days of January and November. As winter sets in, sunlight begins its gradual retreat, but it won't be long before the days start to lengthen again. The gradual increase begins in February, reaching 10 hours, and marches onward through the spring, peaking at a glorious 16 hours in June. As the year progresses toward autumn, daylight begins to dwindle once more, signaling the cyclical nature of time in this charming locale. The consistent ebb and flow of daylight not only shapes the landscape but also influences the rhythm of life for the residents of Waterloo.

Average Daylight Hours in Waterloo for December

The chart illustrates the variation in daylight duration in Waterloo throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 30m10h 2m11h 55m13h 50m15h 31m16h 23m15h 55m14h 25m12h 34m10h 39m8h 56m8h 1m
Data source: Waterloo daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Waterloo

As December settles over Waterloo, Belgium, the average wind speed holds steady at 4.2 m/s (9 mph), reflecting a slight dip from the preceding months. This gentle breeze is emblematic of winter's approach, following November's calm winds of 3.4 m/s (8 mph). Notably, the colder months exhibit a trend of fluctuating wind speeds, with January, February, and October showcasing stronger winds averaging 4.4 m/s (10 mph). In contrast, the summer months reveal a more subdued atmosphere, particularly June, where winds plummet to 2.8 m/s (6 mph). December, capturing this transitional essence, embraces a cool but inviting charm, bridging the vibrant autumn breezes with the stillness of winter.

Average December Wind Speed in Waterloo

The chart displays monthly wind speed patterns in Waterloo, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.44.64.13.44.42.83.43.43.04.43.44.2 m/s
Data source: Waterloo December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Waterloo Compares to Other Months

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

In December, the weather features a relatively mild average temperature of 5°C (42°F), with a maximum reaching 15°C (59°F) and a minimum of -4°C (24°F). This month experiences more precipitation, totaling 92 mm (3.6 in) over 17 days, along with high humidity at 92%. In contrast, January brings slightly colder conditions with an average temperature of 4°C (39°F), a maximum of 14°C (57°F), and a minimum dipping to -7°C (20°F). Precipitation in January decreases to 65 mm (2.6 in) over just 12 days, while humidity remains slightly lower at 91%. For a detailed look at the weather specifics in January, check Waterloo weather in January.

December and February weather exhibit some notable differences, particularly in temperature and precipitation patterns. In December, the temperatures range from a minimum of -4°C (24°F) to a maximum of 15°C (59°F), with an average temperature of 5°C (42°F) and a higher humidity level of 92%. This month also sees considerable precipitation, totaling 92 mm (3.6 in) over 17 days. In contrast, February experiences slightly colder minimum temperatures, dipping to -9°C (17°F), while maximum temperatures reach up to 19°C (66°F), maintaining the same average of 5°C (42°F). Notably, February has less precipitation, amounting to 70 mm (2.7 in) over 12 days and slightly lower humidity at 89%. For a more detailed look at February’s climate, you can check Waterloo weather in February.

December typically brings a chill with temperatures ranging from a minimum of -4°C (24°F) to a maximum of 15°C (59°F), along with significant precipitation totaling 92 mm (3.6 in) over 17 days and high humidity levels of 92%. In contrast, March experiences slightly milder conditions, with temperatures fluctuating from -9°C (17°F) to a warmer maximum of 23°C (74°F) and a reduced precipitation amount of 71 mm (2.8 in) over 14 days. The humidity in March is also lower at 87%, indicating a shift towards drier air as spring approaches. For more detailed information, you can check Waterloo weather in March.

December and April present a striking contrast in weather conditions. In December, temperatures range from a chilling minimum of -4°C (24°F) to a mild maximum of 15°C (59°F), with an average of 5°C (42°F). This month is characterized by high humidity at 92% and considerable precipitation, totaling 92 mm (3.6 in) over 17 rainy days. In contrast, April sees a significant rise in temperatures, with lows still at -4°C (26°F) but reaching a pleasant high of 27°C (81°F) and an average of 10°C (50°F). Notably, April experiences much less rainfall, with only 36 mm (1.4 in) spread over just 8 days and a slightly lower humidity of 85%. For more details on the weather specifics in April, check out Waterloo weather in April.

December and May present contrasting weather patterns. In December, temperatures range from a chilly -4°C (24°F) at their lowest to a mild 15°C (59°F) at their peak, with an average of 5°C (42°F). The month experiences notable precipitation, totaling 92 mm (3.6 in) over 17 days, alongside high humidity at 92%, making it a damp and cool experience. In contrast, May offers a more temperate climate with minimum temperatures of 0°C (33°F) and maximums reaching a warm 31°C (87°F), averaging 13°C (57°F). This month sees less precipitation, averaging 60 mm (2.4 in) over 13 days and lower humidity at 82%, resulting in a generally more pleasant and inviting atmosphere. For more specifics on the weather in May, you can visit Waterloo weather in May.

December and June showcase striking contrasts in weather conditions. In December, temperatures range from a chilly -4°C (24°F) to a mild 15°C (59°F), with an average of 5°C (42°F). The month is characterized by high humidity at 92% and notable precipitation, with 92 mm (3.6 in) over 17 days. In contrast, June offers a much warmer climate, with temperatures ranging from a minimum of 7°C (45°F) to a maximum of 33°C (91°F) and an average of 18°C (65°F). Humidity decreases to 82%, and precipitation slightly lessens to 72 mm (2.8 in) over 11 days. For more details on the June weather, visit Waterloo weather in June.

December and July present a striking contrast in weather. In December, temperatures can drop as low as -4°C (24°F) and usually hover around an average of 5°C (42°F), with highs reaching up to 15°C (59°F). This month also tends to be quite humid, with a humidity level of 92% and average precipitation of 92 mm (3.6 in) over 17 rainy days. In sharp contrast, July experiences much warmer weather, with minimum temperatures of 8°C (46°F) and averages soaring to 19°C (66°F), sometimes peaking at a sweltering 39°C (102°F). The summer month offers a drier climate, with total precipitation of 74 mm (2.9 in) spread over just 11 days and a reduced humidity of 80%. For those interested in a detailed look at July weather conditions, you can check out Waterloo weather in July.

December and August present stark contrasts in weather conditions. December brings chillier temperatures, with a minimum of -4°C (24°F) and an average of 5°C (42°F), while August enjoys milder warmth, featuring a minimum of 7°C (46°F) and an average of 19°C (66°F). The maximum temperatures also highlight this difference, soaring to 36°C (97°F) in August compared to a more temperate maximum of 15°C (59°F) in December. Both months experience significant precipitation, but December has slightly more at 92 mm (3.6 in) over 17 days, compared to August's 84 mm (3.3 in) over 14 days. Additionally, December's humidity is notably higher at 92%, while August experiences a more comfortable humidity level of 76%. For more detailed information, check out Waterloo weather in August.

December and September exhibit stark contrasts in weather patterns. December typically experiences much colder temperatures, with averages around 5°C (42°F) and minimums dipping down to -4°C (24°F). In comparison, September enjoys milder conditions, featuring an average of 15°C (60°F) and maximums soaring to 33°C (91°F). Precipitation is more frequent in December, with 92 mm (3.6 in) spread across 17 days, compared to September's 58 mm (2.3 in) over just 10 days. Additionally, December has higher humidity levels at 92%, while September's humidity stands at 82%. For more details, you can check Waterloo weather in September.

In comparing the weather of December and October, there are notable differences. December experiences colder temperatures, with a minimum of -4°C (24°F) and an average of 5°C (42°F), while October boasts milder conditions, with a minimum of 1°C (35°F) and an average of 12°C (54°F). Additionally, October tends to be drier, recording 78 mm (3.1 in) of precipitation over 13 days, compared to December’s 92 mm (3.6 in) across 17 days. Humidity is slightly higher in December at 92%, compared to October's 89%. For more insights on October weather, check out Waterloo weather in October.

In comparing the weather of December and November, it’s evident that December is cooler overall, with average temperatures ranging from a minimum of -4°C (24°F) to a maximum of 15°C (59°F), compared to November's milder min of -3°C (28°F) and max of 18°C (65°F). Additionally, December experiences significantly more precipitation, totaling 92 mm (3.6 in) over 17 days, while November sees just 57 mm (2.3 in) across 11 days. Both months maintain a high humidity level of 92%, creating a consistently damp atmosphere. For more detailed information about November's climate, visit Waterloo weather in November.

Compare Waterloo's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Waterloo

As December settles in Waterloo, the weather takes on a distinct chill, marking a notable shift from the milder months that precede it. With temperatures that can dip to as low as -4°C, residents often find themselves bundling up against the brisk air. This month is characterized by an increased humidity of 92%, coupled with frequent rainfall, leading to approximately 17 days of precipitation. This contrasts sharply with the drier and warmer conditions experienced earlier in the year. As December wraps the town in a wintry embrace, it truly sets the stage for the festive season ahead. For more on the climatic patterns throughout the year, visit Waterloo Climate.