Last updated: August 21, 2025
In Uccle, Belgium, December showcases a crisp average temperature of 5°C (42°F), oscillating between a maximum of 15°C (59°F) and a brisk minimum of -5°C (24°F). This month is characterized by frequent rain, with a total precipitation of 93 mm (3.7 in) occurring across 17 days, creating a damp atmosphere. The high humidity level of 92% adds to the chill, making warm layers essential for anyone venturing outdoors. December in Uccle embodies the essence of a cozy winter, where sporadic precipitation and low temperatures shape the serene landscape.
In December, Uccle, Belgium begins to embrace the chill of winter, as temperatures dip with a minimum of -5°C (24°F). The average temperature hovers around 5°C (42°F), providing a brisk backdrop to the festive season. Days can still reach a comfortable maximum of 15°C (59°F), offering occasional reprieves from the cold. Overall, December reflects a gradual transition into winter, with temperatures notably cooler than those in the preceding autumn months, yet maintaining a mildness that makes outdoor celebrations enjoyable. As the year draws to a close, residents and visitors alike can anticipate a charmingly crisp atmosphere perfect for holiday gatherings.
December in Uccle, Belgium, wraps up the year with notable precipitation, reaching a substantial 93 mm (3.7 in) over 17 days. This marks a significant increase compared to previous months, particularly when juxtaposed with the autumnal months of October and November, which recorded 76 mm and 57 mm respectively. The trend showcases a shift towards wetter conditions as winter sets in, with December's precipitation not only surpassing the average for the year but also indicating a propensity for frequent rain. This month stands out as a transitional period, where the landscape is often cloaked in a mix of festive cheer and wet weather, a hallmark of Belgium's late-year climate.
In Uccle, Belgium, December marks a continuation of the trend seen in the preceding months, with humidity levels reaching 92%, matching November's figures. The data reveals a clear pattern: humidity is generally high throughout the winter, peaking in late autumn and early winter before gradually decreasing in spring and summer. This consistent moisture in December, alongside November's climate, creates a distinctly chilly and damp atmosphere, characteristic of the region as the year draws to a close. As the month progresses, residents can expect the same enveloping humidity that defines Uccle’s winter charm.
In Uccle, Belgium, December marks a return to a low UV Index, measuring just 1. This indicates minimal sun exposure, with a corresponding burn time of 45 minutes, making it a safe month for outdoor activities without the need for sun protection. As the year transitions from the sunniest summer months, where the UV Index peaked at 8 in June and July, December's readings fall comfortably within the low category, offering a reprieve during winter. This gradual decline in UV levels from the moderate indices in spring to the low readings of winter highlights the seasonal variations in sun exposure. Stay informed and plan your winter outings wisely by checking the latest updates on the Uccle UV Index.
UV Risk Categories
In Uccle, Belgium, December marks the transition into a season of shorter days and cooler weather, offering only 143 hours of sunshine. This month follows a consistent trend of diminishing daylight as winter approaches; throughout the year, sunshine peaks in the summer months of June and July with an impressive 398 and 406 hours, respectively. As autumn unfolds, sunlight wanes, dropping to 190 hours in November and continuing its descent into December. The data reveals a clear cycle, where long, sunlit days of spring and summer give way to the muted glow of winter, inviting residents to seek warmth indoors as daylight hours shrink. Despite its lower tally, December’s sunshine still carries a hint of the light that will return with the coming seasons.
In Uccle, Belgium, the likelihood of enjoying sunny weather significantly dips in December, with a mere 15% chance of sunshine. This trend marks a stark contrast to the brighter days of spring, where April boasts a 50% probability of sunshine, suggesting that as the year winds down, cloud cover blankets the region more frequently. Following the generally gloomy November, which offers only a 24% chance of sunny spells, December continues this pattern, leading residents to savor any hint of sunlight during the short days of winter. While the chances of sunshine may be low, the crisp December air and the holiday season still bring their own unique charm to Uccle.
In Uccle, Belgium, daylight duration experiences a rhythmic ebb and flow throughout the year, with December marking a continuation of the shorter days characteristic of late autumn. As the year winds down, daylight lingers for about 8 hours, mirroring the hours seen in January and November. This pattern reflects a wider trend, where daylight gradually lengthens from the early months of the year, reaching a peak of 16 hours in June before retreating once more as winter sets in. The gradual increase from approximately 8 hours in winter to about 15 hours in late spring showcases the diverse interplay of seasons, offering a captivating glimpse into nature's cycle in Uccle.
As December settles over Uccle, Belgium, the average wind speed dances at 4.2 m/s (9 mph), slightly below the peaks of earlier months but still brisk enough to remind residents that winter is on the horizon. Compared to November's 3.3 m/s (7 mph), December exhibits a gentle uptick, suggesting the chillier air invigorates the breezes that sweep through the streets and parks. Interestingly, this month’s winds are reminiscent of the 4.4 m/s (10 mph) experienced in both January and May, hinting at a resilience in wind patterns as they fluctuate with the seasons. Though the summer months showcased calmer air, it's clear that as the year closes, Uccle's winds fortify the embrace of winter, bringing both a refreshing nip to the air and a hint of anticipation for the holidays ahead.
Weather in Uccle varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Uccle, focusing on differences in temperature, rainfall, humidity, and UV levels.
December and January exhibit quite similar weather patterns, although January tends to be slightly colder. In December, temperatures range from a minimum of -5°C (24°F) to a maximum of 15°C (59°F), with an average of 5°C (42°F). Humidity during this month is quite high at 92%, and there are about 93 mm (3.7 in) of precipitation spread over 17 days. In contrast, January sees temperatures dip a bit lower, with a minimum of -7°C (20°F) and a maximum of 14°C (57°F), leading to an average temperature of 4°C (39°F). Precipitation decreases to 65 mm (2.5 in) over just 12 days, and humidity remains slightly lower at 91%. For more detailed weather statistics, you can check Uccle weather in January.
December weather tends to be colder and wetter compared to February. While both months share the same average temperature of 5°C (42°F), December experiences a milder maximum temperature of 15°C (59°F) compared to February's higher maximum of 19°C (66°F). Additionally, December records more precipitation, with 93 mm (3.7 in) over 17 days, whereas February sees only 69 mm (2.7 in) over 12 days. The humidity slightly decreases from 92% in December to 89% in February, making February feel somewhat drier. For more details, you can refer to Uccle weather in February.
December and March present contrasting weather conditions. In December, temperatures range from a chilly -5°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 significant precipitation of 93 mm (3.7 in) spread over 17 days. In contrast, March experiences a broader temperature range, from a low of -8°C (17°F) to a high of 23°C (74°F), with an average of 7°C (45°F). While it is slightly drier in March with total precipitation of 70 mm (2.8 in) across 14 days, the humidity is also lower at 87%. For a detailed look at the weather in March, you can check Uccle weather in March.
In December, temperatures tend to be chilly, ranging from a minimum of -5°C (24°F) to a maximum of 15°C (59°F), with an average of 5°C (42°F). The month is characterized by high humidity at 92% and significant precipitation, totaling 93 mm (3.7 in) over 17 days. In contrast, April brings a noticeable warming trend, with temperatures ranging from a minimum of -4°C (26°F) to a maximum of 27°C (80°F) and an average of 10°C (50°F). This month has lower precipitation at 37 mm (1.5 in) across just 8 days and slightly reduced humidity at 85%. For more details on the weather conditions during this time, check out Uccle weather in April.
December and May showcase distinctly different weather patterns. In December, temperatures range from a chilling minimum of -5°C (24°F) to a maximum of 15°C (59°F), with an average of 5°C (42°F). The month experiences significant precipitation, totaling 93 mm (3.7 in) over 17 days, and the high humidity level of 92% adds to the cold atmosphere. In contrast, May brings a much warmer climate, with temperatures ranging from a minimum of 1°C (33°F) to a comforting maximum of 31°C (88°F), averaging around 13°C (57°F). Precipitation is also lower at 58 mm (2.3 in) over 12 days, and humidity decreases to 82%. For a closer look at the weather specifics in May, visit Uccle weather in May.
In December, the weather is quite chilly, with temperatures ranging from a minimum of -5°C (24°F) to a maximum of 15°C (59°F), presenting an average of just 5°C (42°F). The month sees significant precipitation, averaging 93 mm (3.7 in) over 17 days, contributing to a high humidity level of 92%. In contrast, June offers much warmer conditions, with temperatures starting at a minimum of 7°C (44°F) and reaching a maximum of 32°C (91°F), resulting in an average temperature of 18°C (65°F). The overall precipitation in June is lower, at 66 mm (2.6 in) over only 9 days, and the humidity levels are slightly reduced at 82%. For more detailed information about June weather, you can visit Uccle weather in June.
In December, the weather is notably colder, with average temperatures ranging from a minimum of -5°C (24°F) to a maximum of 15°C (59°F), and a high humidity level of 92%. The month also sees around 93 mm (3.7 in) of precipitation over 17 days, reflecting the winter season's chill and dampness. In contrast, July offers a much warmer climate, with temperatures ranging from a minimum of 8°C (46°F) to a scorching maximum of 39°C (102°F) and an average of 19°C (66°F). Precipitation in July is lower, at 71 mm (2.8 in), occurring over just 11 days, and humidity is comparatively less at 80%. For more detailed information on July weather, visit Uccle weather in July.
December and August present contrasting weather conditions in Uccle. In December, temperatures are notably colder, with a minimum of -5°C (24°F) and an average of 5°C (42°F), peaking at 15°C (59°F). The month experiences significant precipitation, totaling 93 mm (3.7 in) across 17 days, accompanied by high humidity at 92%. In comparison, August enjoys much milder weather, with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 36°C (97°F) and an average of 19°C (66°F). Although August has slightly less precipitation at 80 mm (3.2 in) over 14 days, the humidity is notably lower at 76%. For more detailed information about the weather in August, check out Uccle weather in August.
Comparing the weather in December and September reveals distinct seasonal differences. In December, temperatures are quite chilly, with a minimum of -5°C (24°F) and an average of 5°C (42°F), while September enjoys much warmer conditions, featuring a minimum of 4°C (39°F) and an average of 15°C (60°F). The highest temperature in September can reach a comfortable 33°C (91°F), compared to December's maximum of 15°C (59°F). Additionally, December is wetter, with 93 mm (3.7 in) of precipitation over 17 days, compared to September’s 55 mm (2.2 in) over just 9 days. Humidity levels are also higher in December at 92%, compared to September's 82%. For more detailed insights, you can check Uccle weather in September.
In comparing the weather between December and October, we observe a significant drop in temperatures and an increase in precipitation. December typically features chilly temperatures, with a minimum around -5°C (24°F) and an average of 5°C (42°F), peaking at 15°C (59°F). This month also experiences more damp conditions, with 93 mm (3.7 in) of rainfall spread over 17 days and a high humidity level of 92%. In contrast, October showcases milder weather, with minimum temperatures of 1°C (34°F) and an average of 12°C (54°F), reaching a maximum of 25°C (77°F). Precipitation in October is slightly lower at 76 mm (3.0 in) over 13 days, and humidity is marginally lower at 89%. For more details on the weather in October, you can visit Uccle weather in October.
In comparing the weather between November and December, December typically features cooler temperatures, with a minimum of -5°C (24°F) compared to November's minimum of -2°C (28°F). The average temperature in December is slightly lower at 5°C (42°F) against November's 7°C (45°F), while the maximum temperature sees a reduction as well, with December peaking at 15°C (59°F) compared to November's 18°C (65°F). Additionally, December experiences more precipitation, totaling 93 mm (3.7 in) over 17 days, while November sees 57 mm (2.2 in) over 11 days. Both months maintain a high humidity level of 92%. For a detailed look at the weather specifics of November, you can visit Uccle weather in November.
December in Uccle marks a significant transition from the crisp autumn days to the chill of winter, characterized by a cool average temperature and a higher humidity level that makes the air feel even colder. With rain lingering on 17 days throughout the month, precipitation becomes more frequent, contributing to a damp atmosphere that's notably different from the milder conditions of previous months. As the year winds down, December's weather invites cozy indoor gatherings while reminding us to embrace the beauty of the season. For a deeper dive into the year-round conditions in Uccle, visit Uccle Climate.