Last updated: August 21, 2025
December in Uusikaupunki, Finland is a month of striking contrasts as it welcomes winter with chilly temperatures averaging around 1°C (33°F). Daily highs reach up to 7°C (45°F) while dropping to a brisk -16°C (3°F) at times, creating a crisp atmosphere. The town experiences 14 days of precipitation, accumulating about 77 mm (3.0 in), resulting in a humid environment with levels soaring to 89%. This blend of cold and moisture shapes a uniquely enchanting yet frosty landscape, perfect for those who revel in the magic of winter.
In Uusikaupunki, Finland, December welcomes winter with chillier temperatures, reflecting a significant drop as the year draws to a close. Adventuring into this month, you can expect a minimum of -16°C (3°F), while the days offer a modest average of 1°C (33°F) and a maximum reaching up to 7°C (45°F). This pattern marks a transition from the late autumn chill seen in November, where average temps hovered around 4°C (40°F). As December settles in, the crisp air and potential for snow transform the landscape, inviting residents and visitors alike to embrace the beauty of a Finnish winter while preparing for the colder months ahead. The temperature trends underscore the region's hallmark of stark seasonal contrasts, where the icy grip of winter begins its reign.
December in Uusikaupunki, Finland, is marked by a significant increase in precipitation, as the month averages 77 mm (3.0 in) over 14 days. This not only makes it one of the wetter months of the year but also highlights the transition into winter, featuring a notable rise compared to November's 59 mm (2.3 in). With more frequent rain, December prepares the landscape for the snowy weeks ahead, as the city experiences its peak rainy days in the latter part of the year. As precipitation patterns suggest, the onset of winter fosters a distinct shift in Uusikaupunki's climate, painting a picture of a city wrapped in the embrace of winter's damp chill.
In December, Uusikaupunki experiences a humidity level of 89%, marking a slight decline from the high humidity of the preceding months. This month encapsulates a trend observed throughout the year, where humidity levels peak in late autumn and gradually taper off as winter advances. Notably, December's humidity is lower than both November and October, which recorded 91% and 90% respectively, but still remains elevated compared to the drier spring months of April and May. As the year closes, Uusikaupunki maintains a damp atmosphere, characteristic of its winter season, suggesting a continuation of the region's rich maritime influences.
In Uusikaupunki, Finland, December marks the continuation of low UV exposure, with a UV Index of 1 and a burn time of 45 minutes. This trend mirrors the preceding months of November and January, where the UV Index remains consistently low, signifying minimal risk for sunburn. Throughout the year, there is a noticeable increase in UV levels during the summer months, peaking at 7 in June and July, suggesting that the sun's intensity warrants extra caution during that season. Meanwhile, the rest of the year, especially from late autumn to early spring, benefits from reduced UV intensity, offering a reprieve for those mindful of sun exposure. For more detailed insights, visit Uusikaupunki UV Index.
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In Uusikaupunki, Finland, December brings a gentle transition into the depths of winter, featuring an average of 69 hours of sunshine. While this is a modest figure, it stands in sharp contrast to the sun-drenched months that precede it, particularly April and June, which bask in around 366 and 496 hours respectively. As the year progresses, sunlight peaks during the vibrant summer months of May and July, showcasing a striking median of nearly 460 hours. The decline in daylight becomes pronounced as autumn sets in, plummeting to just 121 hours in November before the winter chill brings December to its close. This yearly pattern highlights the cyclical nature of sunshine in Uusikaupunki, offering a tapestry of light and shadow that shapes the Finnish experience through each season.
As December unfolds in Uusikaupunki, the likelihood of encountering sunny weather dips to 24%, closely mirroring the overcast trends of late fall. This slight decrease from November’s 26% reflects the gradual transition into winter, where the sun tends to shy away, making way for longer nights and chillier days. Interestingly, December’s sunshine probability is a stark contrast to the summer months, particularly July, when the chance of sun peaks at 60%. As the year progresses, the trend showcases a peak of brightness in the summer, followed by a steady decline towards the winter months, underscoring the unique atmospheric shifts in this coastal town.
In Uusikaupunki, Finland, December brings the shortest days of the year, with daylight lasting only 5 hours. The trend is clear as we move from the long, sun-drenched days of summer—boasting up to 19 hours of daylight in June—to the dimming twilight of winter. As we transition from November's 7 hours to December's twilight, the diminishing sunlight marks a poignant shift in the seasonal rhythm. Following this pattern, the days begin to lengthen again in January, paving the way for the gradual return of sunshine, with daylight hours steadily increasing as spring approaches. This cyclical dance of daylight highlights the stark contrasts in Uusikaupunki's seasonal experience, where each month brings its own unique charm and character.
In Uusikaupunki, December brings a noticeable shift in the wind patterns, with an average speed of 5.0 m/s (11 mph). This month's winds are a slight dip from the more blustery October, which recorded the highest average at 6.1 m/s (14 mph). However, December's winds are still significantly stronger than the calmer summer months, where speeds hovered around 3.7 to 4.5 m/s. As the year draws to a close, December's winds suggest a transition towards the chill of winter, gracefully echoing the increasing strength observed in the fall months. Overall, the wind trends reflect a seasonal ebb and flow, culminating in a brisk and refreshing atmosphere that defines the coastal charm of this Finnish locale.
Weather in Uusikaupunki varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Uusikaupunki, focusing on differences in temperature, rainfall, humidity, and UV levels.
December and January in Uusikaupunki showcase a notable transition in winter weather. December experiences a slightly milder average temperature of 1°C (33°F), with maximums reaching 7°C (45°F) and minimums dipping to -16°C (3°F). The month is marked by higher precipitation, totaling 77 mm (3.0 in) over approximately 14 days, along with a humidity level of 89%. In contrast, January is distinctly colder, with an average temperature dropping to -1°C (31°F), a minimum of -17°C (1°F), and a similar maximum of 8°C (46°F). The precipitation decreases to 45 mm (1.8 in) over about 10 days, albeit with slightly higher humidity at 92%. For more detailed insights, check out Uusikaupunki weather in January.
December and February present notable contrasts in weather conditions. December experiences a milder average temperature of 1°C (33°F), with daily highs reaching up to 7°C (45°F), while February's average dips to -2°C (28°F) with similar maximum temperatures of 7°C (44°F). Precipitation is more frequent in December, falling on 14 days and totaling 77 mm (3.0 in), compared to February, which sees only 40 mm (1.6 in) over 8 days. Humidity remains relatively high in both months, with February just slightly more humid at 90% compared to December's 89%. For more detailed information, visit Uusikaupunki weather in February.
In December, temperatures range from a chilly -16°C (3°F) as a minimum to a milder maximum of 7°C (45°F), with an average temperature of about 1°C (33°F). This month experiences considerable precipitation, averaging 77 mm (3.0 in) over 14 days, all while maintaining a high humidity level of 89%.
In contrast, March tends to be even colder at night, with minimum temperatures reaching -21°C (-6°F), although daytime highs can rise to about 10°C (51°F) for an average of 0°C (33°F). Precipitation is less frequent, totaling around 41 mm (1.6 in) over just 9 days, yet humidity remains constant at 89%. For a more detailed look at March weather in Uusikaupunki, you can visit Uusikaupunki weather in March.
In December, the weather presents a stark winter chill with temperatures ranging from a frigid minimum of -16°C (3°F) to a mild maximum of 7°C (45°F), averaging around 1°C (33°F). The month is characterized by significant precipitation of 77 mm (3.0 in), spread over 14 days, contributing to a high humidity level of 89%. In contrast, April brings a noticeable shift, with temperatures rising from a minimum of -7°C (19°F) to a pleasant maximum of 18°C (65°F), averaging 4°C (39°F). This month sees considerably less precipitation, totaling 29 mm (1.2 in) over just 8 days, and a slightly lower humidity of 85%. For more information on April weather specifics, see Uusikaupunki weather in April.
December and May present strikingly different weather patterns. In December, temperatures can plummet to a minimum of -16°C (3°F), with an average temperature around 1°C (33°F) and a maximum of 7°C (45°F). The month experiences frequent precipitation, accumulating to 77 mm (3.0 in) over 14 days, combined with high humidity at 89%. In contrast, May offers a much milder climate with temperatures ranging from a minimum of -2°C (30°F) to a pleasant maximum of 23°C (73°F), averaging around 9°C (48°F). Rainfall decreases to 38 mm (1.5 in) over just 7 days, and humidity drops to 77%. For more details about May's weather, you can visit Uusikaupunki weather in May.
December and June present stark contrasts in weather conditions. December is characterized by cold temperatures, with averages hovering around 1°C (33°F) and dipping as low as -16°C (3°F), accompanied by high humidity levels of 89%. This month sees significant precipitation, totaling 77 mm (3.0 in) over about 14 days, resulting in a wintry landscape. In contrast, June offers a more pleasant climate, with average temperatures rising to 15°C (59°F) and highs reaching up to 27°C (81°F). The humidity decreases to 78%, and precipitation is lighter at 40 mm (1.6 in) over just 7 days, making it a favorable time for outdoor activities. For a detailed overview, check out Uusikaupunki weather in June.
December and July present starkly contrasting weather conditions. In December, temperatures can plummet to a minimum of -16°C (3°F), with an average of around 1°C (33°F) and a maximum of 7°C (45°F). This month also experiences significant precipitation, totaling 77 mm (3.0 in) over approximately 14 days, accompanied by high humidity at 89%. In contrast, July boasts much milder conditions, with minimum temperatures rarely dropping below 9°C (48°F), an average of 17°C (64°F), and peaks reaching 30°C (86°F). Precipitation in July is lighter, at 67 mm (2.6 in) spread over about 10 days, and humidity is comparatively lower at 78%. For more specific details on July weather, you can check Uusikaupunki weather in July.
December and August present stark contrasts in weather. December typically sees colder temperatures, with a minimum of -16°C (3°F) and an average of around 1°C (33°F), while August enjoys a milder climate, with temperatures ranging from a minimum of 7°C (45°F) to a maximum of 28°C (82°F). Precipitation is fairly similar in both months, with December receiving 77 mm (3.0 in) over 14 days compared to August's 73 mm (2.9 in) over 12 days. Additionally, humidity levels are higher in December at 89%, compared to 79% in August, contributing to a much chillier feel in winter. For more insights on August weather, you can refer to Uusikaupunki weather in August.
Comparing the weather between December and September highlights the significant seasonal changes. In December, temperatures drop to a minimum of -16°C (3°F) and have an average of 1°C (33°F), with maximums reaching only 7°C (45°F). The month is characterized by high humidity at 89% and substantial precipitation of 77 mm (3.0 in) over 14 days. In contrast, September experiences milder weather, with a minimum of 2°C (35°F) and an average of 13°C (55°F), peaking at 23°C (73°F). This month sees slightly less precipitation at 71 mm (2.8 in) over 12 days, and humidity levels are slightly lower at 86%. For those interested in more detailed information about weather conditions, you can check Uusikaupunki weather in September.
When comparing the weather in December and October, notable differences emerge. December experiences much colder temperatures, with a minimum of -16°C (3°F) and an average of 1°C (33°F), while October is milder, with minimum temperatures around -4°C (25°F) and an average of 8°C (46°F). Additionally, October boasts higher maximum temperatures, reaching up to 17°C (62°F), compared to December's maximum of 7°C (45°F).
Precipitation is fairly consistent between the two months, with October having slightly more at 90 mm (3.5 in) over 17 days, while December sees 77 mm (3.0 in) over 14 days. Humidity levels are quite similar, with October at 90% and December just a touch lower at 89%. For a more detailed overview of October's weather, you can visit Uusikaupunki weather in October.
In comparing the weather between November and December, December exhibits colder temperatures, with a minimum of -16°C (3°F) and an average of 1°C (33°F), while November's temperatures range from a minimum of -7°C (19°F) to an average of 4°C (40°F). Precipitation is higher in December at 77 mm (3.0 in) over 14 days, compared to 59 mm (2.3 in) over 12 days in November. The humidity levels remain relatively close, with December at 89% and November slightly higher at 91%. Overall, December tends to be harsher and wetter than November. For more detailed information, you can check Uusikaupunki weather in November.
In December, Uusikaupunki transforms into a winter wonderland, with temperatures that dip significantly compared to the milder months preceding it. The chilly air is paired with high humidity levels, and a notable amount of precipitation falls throughout the month, often cloaking the landscape in a soft blanket of snow. As daylight wanes, December's weather creates a stark contrast to the brighter, warmer days of autumn, leaving behind a cozy yet brisk atmosphere that invites holiday cheer. For a deeper insight into the broader climate trends, explore Uusikaupunki Climate.