Last updated: February 26, 2025
In Bonn, Germany, December brings a crisp chill to the air, with maximum temperatures reaching 15°C (59°F) and an average of 5°C (41°F). As the month unfolds, residents can expect a significant drop, with minimums dipping to -5°C (23°F), creating a winter wonderland atmosphere. This month is also characterized by a substantial precipitation amount of 100 mm (4.0 in), spread over 19 days, ensuring that rain, or perhaps even light snow, is likely. Coupled with a high humidity level of 92%, the weather can feel particularly brisk, perfect for cozy evenings and festive gatherings.
In Bonn, Germany, December temperatures usher in the chill of winter, with minimums dropping to around -5°C (23°F). The average temperature hovers at approximately 5°C (41°F), providing a crisp backdrop to the festive season. While the maximum can reach 15°C (59°F), the month marks a noticeable shift towards colder weather compared to the milder autumn months of November. This trend of decreasing temperatures reflects a transitional phase as Bonn prepares for January's even chillier embrace, showcasing the city's distinct seasonal rhythm. Visitors can expect a cozy atmosphere punctuated by festive lights, making it a charming time to explore the city despite the brisk air.
In December, Bonn experiences a notable uptick in precipitation, with an impressive total of 100 mm (4.0 in), making it the wettest month of the year. This increase is evident in the 19 days of measurable rainfall, significantly surpassing the monthly averages seen earlier in the year. The trend highlights a shift as winter settles in, contrasting with the milder, drier spring months. While most months see precipitation levels between 55 mm and 93 mm, December's substantial rainfall not only influences local weather patterns but also prepares the region for the chilly days ahead. As the year wraps up, Bonn's landscape becomes lush and vibrant, nourished by this seasonal deluge.
As December settles over Bonn, Germany, the city experiences a noticeable uptick in humidity, reaching 92%—the highest level of the year. This increase is part of a broader seasonal trend, as humidity peaks during the winter months, climbing steadily from 88% in October and 91% in November. Notably, this winter moisture contributes to the crisp air and overcast skies typical of the season, contrasting sharply with the drier summer months where humidity dips to a low of 71% in August. As the year draws to a close, Bonn’s December humidity reflects a return to the damp, cool conditions that characterize the region, hinting at the cozy indoor moments that winter often encourages.
In Bonn, Germany, December marks the return to a low UV Index, registering at 1. This is consistent with the trend observed in the earlier winter months, where both January and November also maintained a low UV exposure category, allowing for a more relaxed approach to sun safety. With a burn time of 45 minutes, residents and visitors can enjoy the outdoors without the immediate threat of sunburn, making it a great time for leisurely strolls and winter activities. As the year progresses from the intense UV peaks of summer—where indices soared to 8 in June and July—December gently reminds us of the seasonal ebb and flow of sun exposure. To learn more about UV Index trends in Bonn, visit Bonn UV Index.
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In Bonn, Germany, the month of December brings a gentle dip in sunshine, with 126 hours of daylight. This marks a notable contrast to the vibrant spring and summer months, where June and July bask in the glow of nearly 400 hours of sunshine. December’s sunlight is akin to a soft whisper against the backdrop of winter's chill, following a gradual decline from the previous months. While the onset of winter sees shorter days, it’s a reminder of the shift from the exuberant brightness of May and June, both exceeding 390 hours. As the year closes, Bonn embraces the cozy, reflective mood of winter, where the charm of the low winter sun casts a serene light over the city, hinting at the promise of brighter days ahead.
When it comes to December weather in Bonn, Germany, sunlight is not in abundance, with a mere 14% chance of sunny days. This significant dip in sunshine from the preceding months highlights a clear trend: as winter approaches, the likelihood of enjoying bright, sunny weather decreases markedly. In contrast, the early months of the year, particularly February and March, show a noticeable increase in sunlight, making them more favorable for those seeking outdoor activities. December's gloom further emphasizes the stark shift from the somewhat sunnier autumn months, with November's 24% providing a fleeting glimpse of brightness before the deep winter sets in. So, while December may shield Bonn in a cozy, wintry embrace, expecting rays of sunshine will likely lead to disappointment.
As the year winds down, December in Bonn, Germany, mirrors the shorter days of its preceding months, with just 8 hours of daylight. This trend of diminishing daylight begins in November, where the sun offers the same modest duration, reflecting the deepening embrace of winter. The pattern becomes more pronounced when observed alongside the brighter months, with January and February starting with a gradual uptick in sunlight, culminating in the vibrant 15 hours of daylight by May. As we move from spring into the long, sun-kissed days of summer, June boasts its peak at 16 hours of daylight, before the gradual decline begins anew. This cyclical rhythm of light and dark not only marks the changing seasons but also shapes daily life in Bonn, reminding residents and visitors alike of nature's enchanting ebb and flow.
As December unfolds in Bonn, Germany, the average wind speed reaches a brisk 3.5 m/s (8 mph), signaling a notable uptick from the calmer days of summer. This increase in wind intensity echoes the trend seen in the autumn months, where speeds fluctuate between 2.7 m/s and 3.7 m/s, yet maintain a comfortable 6 to 8 mph range. While the summer months, particularly June and July, present the lowest gusts averaging around 2.4 m/s (5 mph), the year ends on a more invigorating note. With December's winds briskly swirling, there’s a palpable shift in the atmosphere, heralding the onset of winter and inviting residents to embrace the seasonal chill with the invigorating breezes that Bonn has to offer.
The weather in Bonn changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of December's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Bonn and find detailed weather information for every month.
In December, the weather is typically milder, with average temperatures around 5°C (41°F) and maximums reaching up to 15°C (59°F). However, winter's chill is still felt, particularly with minimum temperatures dropping to -5°C (23°F). December also sees a significant amount of precipitation, with about 100 mm (4.0 in) falling over 19 days, and humidity levels are quite high at 92%.
In contrast, January tends to be colder, with average temperatures dipping slightly to 3°C (38°F) and minimums falling further to -8°C (18°F). While January remains relatively damp, precipitation is less frequent, totaling around 72 mm (2.8 in) over 14 days, and humidity stays close to that of December at 91%. For more detailed information, you can check Bonn weather in January.
December and February offer distinct weather experiences despite sharing an average temperature of 5°C (41°F). December's temperatures range from a chilly -5°C (23°F) to a milder 15°C (59°F), while February sees a slightly colder minimum of -10°C (14°F) but reaches a maximum of 21°C (69°F). Precipitation is heavier in December with 100 mm (4.0 in) over 19 days compared to February's 68 mm (2.7 in) spread across 12 days, resulting in slightly lower humidity levels in February at 90%. For more detailed insights, refer to Bonn weather in February.
In December, the weather typically presents a chillier atmosphere with temperatures ranging from a minimum of -5°C (23°F) to a maximum of 15°C (59°F), averaging around 5°C (41°F). The month also sees significant precipitation, totaling 100 mm (4.0 in) over approximately 19 days, accompanied by high humidity at 92%.
In contrast, March experiences a slight warming trend, with temperatures varying from a minimum of -10°C (15°F) to a maximum of 23°C (73°F), averaging around 7°C (45°F). Precipitation decreases to 72 mm (2.8 in) across about 15 days, and humidity remains relatively lower at 87%.
For a detailed look at the weather in Bonn during March, you can visit Bonn weather in March.
December and April present contrasting weather patterns, with December typically colder and wetter. In December, temperatures can plunge to a minimum of -5°C (23°F) and average around 5°C (41°F), while highs reach up to 15°C (59°F). This month sees a considerable amount of precipitation at 100 mm (4.0 in) across 19 days, combined with high humidity at 92%.
In contrast, April experiences milder temperatures, with a minimum of -3°C (26°F) and an average of 10°C (50°F), peaking at a maximum of 27°C (81°F). Precipitation is significantly lower, totaling 36 mm (1.4 in) over just 9 days, and humidity drops to 84%. For more insights, you can check out Bonn weather in April.
December and May present significantly different weather conditions. In December, temperatures can drop as low as -5°C (23°F) with an average temperature around 5°C (41°F) and a maximum reaching 15°C (59°F). This month is characterized by high humidity at 92% and frequent precipitation, totaling 100 mm (4.0 in) over 19 days. In contrast, May enjoys milder conditions with temperatures ranging from a minimum of 0°C (33°F) and an average of 14°C (57°F) to a maximum of 33°C (91°F). Precipitation in May is lighter at 70 mm (2.8 in) over just 13 days, and the humidity drops to a more comfortable 77%. For a detailed look at Bonn weather in May, you can visit Bonn weather in May.
In December, the weather is notably colder, with temperatures ranging from a chilly -5°C (23°F) to a milder maximum of 15°C (59°F). Rainfall is significant during this month, totaling around 100 mm (4.0 in) over 19 days, and the humidity remains high at 92%. In contrast, June experiences warmer conditions, with temperatures starting at a minimum of 8°C (47°F) and peaking at 35°C (95°F), along with an average of 19°C (66°F). Precipitation in June is lighter, totaling 68 mm (2.7 in) over just 11 days, and the humidity drops to a more comfortable 74%. For more details, check out Bonn weather in June.
December and July present stark contrasts in weather patterns. In December, temperatures range from a chilly -5°C (23°F) at night to a milder 15°C (59°F) during the day, with an average of 5°C (41°F). The month experiences significant precipitation, totaling 100 mm (4.0 in) over 19 days, along with high humidity at 92%. Conversely, July boasts much warmer weather, with nighttime lows of 8°C (47°F) and daytime highs reaching up to a sweltering 40°C (105°F), averaging around 20°C (67°F). Though slightly less rainy, July still sees 93 mm (3.7 in) of precipitation across 11 days, accompanied by a noticeable drop in humidity to 72%. For those curious about specific conditions, you can check Bonn weather in July.
The weather in December is significantly colder than in August, with temperatures ranging from a minimum of -5°C (23°F) to a maximum of 15°C (59°F), compared to August's milder range of 7°C (44°F) to 36°C (98°F). December also experiences higher humidity levels, averaging at 92%, versus August's 71%. Precipitation is more frequent in December, occurring over 19 days with a total of 100 mm (4.0 in), whereas August sees less rain over 15 days, totaling 80 mm (3.2 in). For more specific details on the climate during this summer month, visit Bonn weather in August.
When comparing the weather in December and September, notable differences emerge. December experiences colder temperatures, with a minimum of -5°C (23°F) and an average high of only 15°C (59°F), while September boasts a much milder climate, with temperatures ranging from a minimum of 2°C (36°F) to a maximum of 34°C (93°F) and an average of 16°C (60°F). In terms of precipitation, December sees more rainfall (100 mm) spread over 19 days, compared to September’s lighter rainfall of 55 mm over just 10 days. Additionally, December's humidity is higher at 92%, compared to September's 81%. For more detailed insights, you can check Bonn weather in September.
In comparing the weather between December and October, December tends to be significantly cooler, with average temperatures ranging from a brisk -5°C (23°F) to a maximum of 15°C (59°F), while October enjoys a milder temperature range averaging from 0°C (33°F) to 27°C (80°F). Precipitation is higher in December, with 100 mm (4.0 in) falling over 19 days, compared to October's 71 mm (2.8 in) across 14 days. Additionally, December's humidity is slightly higher at 92%, compared to October's 88%. For more detailed information on October's climate, you can visit Bonn weather in October.
In December, temperatures tend to be slightly lower than in November, with minimums dropping to -5°C (23°F) compared to -4°C (26°F) in November. The average temperature in December is around 5°C (41°F), while November enjoys a slightly warmer average of 7°C (45°F). December also sees increased precipitation, with 100 mm (4.0 in) falling over approximately 19 days, compared to just 54 mm (2.1 in) over 12 days in November. Humidity remains high in both months, at 92% in December and 91% in November. For more information on November weather, you can check Bonn weather in November.
As December unfolds in Bonn, the weather takes on a distinctive chill compared to the milder months preceding it. Characterized by average temperatures around 5°C (41°F), the atmosphere is notably cooler, with occasional dips that can bring frosty mornings. The month also sees higher humidity levels and increased precipitation, marking a shift towards the wetter winter season, with nearly half the month experiencing rain. This combination of lower temperatures and persistent moisture creates a unique, crisp ambiance in the city, perfect for enjoying the festive holiday spirit. For more detailed insights on the climate throughout the year, visit Bonn Climate.