Last updated: August 21, 2025
In Turku, Finland, December brings a striking contrast of temperatures, with a maximum reaching 7°C (45°F) and dipping as low as -21°C (-5°F). The month averages around 0°C (31°F), creating a chilly atmosphere enriched by a high humidity of 89%. Rainfall is common, with 74 mm (2.9 in) of precipitation spread over approximately 14 days, painting a typical wintry scene. Residents and visitors alike can expect a true taste of winter, with damp conditions and the occasional frost making December a month that encapsulates the unique charm of Finnish winters.
In December, Turku, Finland, experiences a deep chill as temperatures plunge, with a minimum hit of -21°C (-5°F) and an average hovering around 0°C (31°F). As winter firmly establishes its grip, the highs reach a modest 7°C (45°F), marking a clear descent from the milder temperatures of November. This month serves as a precursor to the harshest winter months, revealing a cooling trend that defines the season. With the landscape blanketed in snow and the air biting cold, Turku transforms into a picturesque winter wonderland, inviting those brave enough to embrace its icy charm.
In Turku, Finland, December brings a notable increase in precipitation, with 74 mm (2.9 in) of rainfall recorded over 14 days. This month stands out as one of the wetter times of the year, continuing a trend established in the fall when rainfall peaks in October and November. Compared to the previous months, December's precipitation exhibits a mild rebound from the drier conditions earlier in the season, with only 34 mm (1.3 in) in April and 42 mm (1.7 in) in February. As the year draws to a close, December's dampness serves as a reminder of the shifting seasons, paving the way for the chill of winter while ensuring that the landscapes are well-hydrated despite the cold. This rhythmic pattern of precipitation captures the essence of Turku's climate, blending both the beauty and challenges of the Finnish winter.
In Turku, Finland, December ushers in a notable dip in humidity levels, averaging 89%. This slight decrease reflects a trend toward lower humidity as the year progresses, particularly after the high levels seen in November at 91%. While December remains comfortably humid, it is a relief from the peak months of earlier winter, like January and February, which maintain a consistently high humidity of 92% and 90%, respectively. The last month of the year rounds off a year marked by generally high moisture, yet hints at a gradual shift towards drier conditions as spring approaches. Overall, the climatic rhythm in Turku showcases a graceful undulation in humidity, culminating in yet another comfortable winter month.
In December, Turku, Finland experiences a low UV Index of 1, similar to the readings in January and November. This means residents and visitors can enjoy outdoor activities with minimal concern for sunburn, as the burn time stretches to 45 minutes. As the year progresses from winter into spring, the UV Index gradually climbs, peaking in the summer months of June and July where it reaches a high of 7. Following the warm summer days, UV levels decrease again in the autumn months, emphasizing the cyclical nature of UV exposure in Turku. For more detailed insights and daily updates, check the comprehensive guide here: Turku UV Index.
UV Risk Categories
In Turku, Finland, the winter months can feel particularly dark, and December exemplifies this trend with a modest total of 67 hours of sunshine. As the year unfolds, the sun shines for significantly longer during the spring and summer months, peaking at an impressive 495 hours in June. This drastic shift highlights the waning daylight experienced as the year progresses, reaching a low point in December, just as people kick off the festive season. Interestingly, the gradual increase in sunshine from February’s 158 hours to the exuberant 372 hours in April hints at the eagerly anticipated arrival of spring and longer days, reminding Turku's residents that brighter times are on the horizon.
In Turku, Finland, December presents a 24% chance of sunny weather, aligning with the trend observed in late autumn months. As the year progresses from the crisp sunlight of spring, which peaks at 52% in April, the likelihood of brightness fluctuates, dipping to a low of 10% in January. While December mirrors November's sunshine potential, both months are relatively dim compared to the summer months like June and July, where the probability of sun reaches 55% and 56%, respectively. This consistent decline suggests that December is firmly entrenched in the darker side of winter, yet still offers a glimmer of hope with its modest chance of clear skies.
In Turku, Finland, daylight duration follows a captivating seasonal rhythm. December caps off the year with a mere 5 hours of daylight, the shortest period as the days grow darker. As the calendar turns to January, daylight begins to gradually stretch to 6 hours, signaling the slow ascension of brightness that continues through the winter months. By February, sunlight claims 9 hours, and March sees a promising increase to 11 hours. The transition into spring brings even longer days, peaking in June and July with a generous 18 hours of daylight that energizes the long summer nights. However, as autumn arrives, daylight decreases, leaving October with 10 hours and November dwindling to 7 hours. This cyclical pattern underscores the profound contrast between the brief, twilight-filled winters and the vibrant, sunlit summers, making Turku's daylight experience truly unique.
As the year draws to a close, December in Turku greets residents with a brisk average wind speed of 3.5 m/s (8 mph), maintaining a steady flow characteristic of late autumn. This slight uptick from November's 3.7 m/s reflects a general trend of increasing wind speeds as the months progress toward winter. Interestingly, while summer months like June and July recorded some of the calmest breezes at 2.9 m/s (6 mph) and 3.1 m/s (7 mph) respectively, the winds pick up again in October, peaking at 4.5 m/s (10 mph). The overall trend suggests a refreshing change as the cold season approaches, inviting both the beauty of winter and the invigorating embrace of the chilly December air.
Weather in Turku varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Turku, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, the weather is characterized by milder temperatures, with a range from a minimum of -21°C (-5°F) to a maximum of 7°C (45°F) and an average of 0°C (31°F). The month experiences considerable precipitation, totaling 74 mm (2.9 in) over 14 days, and a humidity level of 89%. In contrast, January is generally colder, starting with a minimum temperature of -25°C (-13°F) and an average of -2°C (28°F), while still reaching a maximum of 8°C (47°F). Precipitation decreases to 48 mm (1.9 in) spread over 9 days, with humidity slightly higher at 92%. For more detailed weather information, check out Turku weather in January.
December and February present distinct winter weather patterns. In December, temperatures range from a chilly -21°C (-5°F) to a milder max of 7°C (45°F), with an average of around 0°C (31°F). The month is characterized by high humidity at 89% and approximately 74 mm (2.9 in) of precipitation over 14 days. In contrast, February features even colder temperatures, with a minimum of -24°C (-11°F) and an average of -3°C (26°F), while still reaching a maximum of 7°C (45°F). Precipitation decreases to 42 mm (1.7 in) over just 8 days, accompanied by a slightly higher humidity of 90%. For more detailed insights, you can check Turku weather in February.
In December, temperatures in Turku tend to range from a chilly -21°C (-5°F) at their lowest to a mild 7°C (45°F) at their peak, with an average of around 0°C (31°F). This month also sees significant precipitation of 74 mm (2.9 in) over 14 days, maintaining a high humidity level of 89%. In contrast, March experiences slightly colder minimum temperatures, dropping to -25°C (-12°F), while the maximum temperature rises to 13°C (55°F). Although March has an average temperature of 0°C (31°F) akin to December, it receives less precipitation, totaling 45 mm (1.8 in) over 10 days, yet maintains the same humidity level of 89%. For more detailed insights on March weather, you can check Turku weather in March.
December weather features a chilly atmosphere with average temperatures hovering around 0°C (31°F), often dipping as low as -21°C (-5°F) and peaking at just 7°C (45°F). The month sees significant precipitation, with around 74 mm (2.9 in) spread over 14 days, resulting in a humid environment at 89%. In contrast, April brings a noticeable warming trend, with average temperatures rising to 4°C (40°F), ranging from a minimum of -12°C (10°F) to a maximum of 21°C (71°F). Precipitation drops to 34 mm (1.3 in) over 9 days, and humidity slightly decreases to 85%. For those interested in specific weather patterns during this time, you can find more information here.
December and May present contrasting weather patterns that highlight the transition from winter to spring. In December, temperatures can drop as low as -21°C (-5°F), with an average of 0°C (31°F) and a maximum of 7°C (45°F). The month is characterized by high humidity at 89% and considerable precipitation, totaling 74 mm (2.9 in) over approximately 14 days. In sharp contrast, May experiences a much milder climate, with temperatures ranging from a low of -5°C (24°F) to a high of 28°C (83°F) and an average of 10°C (50°F). Rainfall decreases to 48 mm (1.9 in) over about 10 days, and humidity drops to 77%. For more details on the pleasant weather in May, check out Turku weather in May.
December and June present stark contrasts in weather conditions. In December, temperatures can plummet to a minimum of -21°C (-5°F), with an average around 0°C (31°F) and a maximum of 7°C (45°F). The month sees substantial precipitation (74 mm or 2.9 in) over 14 days, coupled with a high humidity level of 89%. In contrast, June experiences milder temperatures, with a minimum of 2°C (36°F), an average of 16°C (61°F), and a peak of 30°C (86°F). Rainfall decreases to 45 mm (1.8 in) spread over just 7 days, and humidity drops to a more comfortable 78%. For a detailed look at the delightful weather of June, visit Turku weather in June.
In December, the weather in Turku is characterized by crisp, cold temperatures, with minimums plummeting to -21°C (-5°F) and an average hovering around 0°C (31°F), culminating in maximums of 7°C (45°F). Combined with high humidity levels at 89%, the winter month experiences 74 mm (2.9 in) of precipitation over 14 days, creating a notably chilly atmosphere. In contrast, July brings a much warmer climate, where temperatures range from a minimum of 5°C (40°F) to an average of 18°C (64°F), peaking at a maximum of 33°C (91°F). The month sees slightly higher precipitation at 85 mm (3.4 in) but over fewer days (11 days), along with a lower humidity of 78%, offering a much more pleasant summer ambiance. For a detailed overview of weather patterns, visit Turku weather in July.
December and August present stark contrasts in weather conditions. In December, temperatures can plummet to a chilling minimum of -21°C (-5°F), with an average around freezing at 0°C (31°F) and a maximum of 7°C (45°F). This month is characterized by high humidity at 89% and 74 mm (2.9 in) of precipitation spread over about 14 days. Conversely, August offers a much milder climate, with temperatures ranging from a minimum of 4°C (40°F) to a warm maximum of 29°C (84°F), and an average temperature of 16°C (62°F). While August sees slightly more precipitation at 95 mm (3.7 in) over 13 days, it benefits from lower humidity levels at 79%. These differences highlight the seasonal shift, with December bringing the chill of winter and August embodying the warmth of summer. For more details on August weather, visit Turku weather in August.
December and September exhibit stark contrasts in weather patterns. While December is characterized by frigid temperatures, with averages around 0°C (31°F) and a minimum that can plunge to -21°C (-5°F), September enjoys much milder conditions, with an average temperature of 12°C (54°F) peaking at 23°C (74°F). Additionally, December sees higher humidity at 89%, compared to September's 86%. Though December has slightly more precipitation at 74 mm (2.9 in) over 14 days, September is not far behind with 69 mm (2.7 in) over just 12 days. For a closer look at September weather in Turku, you can visit Turku weather in September.
In comparing December and October weather, December experiences significantly colder temperatures, with average highs at only 7°C (45°F) and lows plummeting to -21°C (-5°F). In contrast, October offers a milder climate, with average temperatures ranging from a minimum of -6°C (21°F) to a pleasant maximum of 17°C (63°F). Precipitation levels in both months are relatively close, with December receiving 74 mm (2.9 in) and October slightly higher at 78 mm (3.1 in), although October sees precipitation over just 15 days compared to December’s 14 days. Humidity levels are similarly high, with December at 89% and October at 90%. For more details, you can check out Turku weather in October.
In comparing the weather of December and November, December tends to be significantly colder, with average temperatures hovering around 0°C (31°F) compared to November's milder average of 3°C (38°F). The minimum temperatures in December can dip as low as -21°C (-5°F), while in November, they range from -9°C (15°F). Additionally, December experiences slightly more precipitation at 74 mm (2.9 in) over 14 days, compared to November's 54 mm (2.1 in) over 10 days. Humidity levels remain high in both months, with December at 89% and November at 91%. If you're interested in a deeper look at the specifics of November’s weather, you can check Turku weather in November.
As December unfolds in Turku, the city experiences a remarkable shift in weather dynamics compared to other months. The average temperature hovers around 0°C (31°F), presenting a chilly embrace that is contrasted by occasional peaks reaching 7°C (45°F). However, it can also plunge to a brisk -21°C (-5°F), making it one of the coldest months of the year. Rainfall is prevalent, with about 74 mm (2.9 in) of precipitation across roughly 14 days, contributing to the city’s lush winter ambiance despite high humidity levels of 89%. This combination creates a distinctive atmosphere, where the moody winter skies and the holiday spirit make December a uniquely enchanting time in Turku. For detailed insights into the climate trends throughout the year, visit Turku Climate.