Last updated: August 21, 2025
December in Porvoo, Finland offers a unique winter experience characterized by a maximum temperature reaching 7°C (44°F), an average chill of -1°C (30°F), and occasional drops to a brisk minimum of -20°C (-3°F). This month sees 73 mm (2.9 in) of precipitation over 16 days, creating a picturesque snowy landscape. With humidity levels soaring at an impressive 96%, the atmosphere is often crisp and invigorating, making it a perfect setting for cozy indoor activities or exhilarating outdoor adventures in this charming Finnish town.
In December, Porvoo, Finland, marks the beginning of deep winter, with temperatures reflecting the region's chilling embrace. The month typically sees minimum temperatures dipping to -20°C (-3°F), while average highs barely reach 7°C (44°F). This stark drop from the milder autumn temperatures sets a stark contrast, as the previous month of November experienced slightly warmer values around 3°C (37°F) on average. As December progresses, the city's landscape transforms into a serene winter wonderland, with snowy vistas that invite both locals and visitors to embrace the magic of the season. The overall trend reveals a significant chill enveloping Porvoo, with the long nights of winter casting a quiet spell over this picturesque town.
December in Porvoo, Finland, brings a significant uptick in precipitation, with an average of 73 mm (2.9 in) falling over 16 days. This pattern reflects the trend of winter's arrival, as December sees one of the highest precipitation totals of the year, surpassed only by the wetter autumn months like October. The month is marked by frequent rain, making it a notable end to the year; the combination of moisture and increased precipitation days contributes to a lush landscape as the winter months set in. Overall, December represents a transition into the cold season, characterized by the shift from fall's abundant rain to the cozy, frosty embrace of winter.
In December, Porvoo, Finland, experiences a notable humidity level of 96%, reflecting a trend of consistently high moisture in the air during the winter months. The humidity remains elevated from January's peak at 98%, gradually tapering off through the earlier months until reaching a low of 74% in June. As the year progresses towards the end, humidity levels rise again, with November also recording 94%. This cyclical pattern highlights the crisp, damp conditions prevalent in Porvoo's climate, showcasing the city's characteristic embrace of winter's chilly embrace while hinting at the more temperate summers ahead.
In December, the UV Index in Porvoo, Finland, registers at a low value of 1, similar to the preceding months of January and November. This consistent low exposure category means that residents and visitors can enjoy the winter landscapes without the worry of sunburn, as the expected burn time remains a generous 45 minutes. Following the high values seen during peak summer months, the return to a low UV Index in winter reflects a seasonal trend that prioritizes indoor warmth and cozy activities over sun-soaked outings. For more detailed information, visit Porvoo UV Index.
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In December, Porvoo, Finland experiences a dip in sunshine, offering just 53 hours of daylight. This month stands out as one of the least sunny, closely mirroring the gray tones of November, which recorded 108 hours of light. As the year winds down, the contrast becomes stark against the increasing light that begins in the early months of the year; for instance, January only has 52 hours to offer. It's a stark reminder of the long, dark winters that precede the vibrant spring, where sunshine peaks in June with a dazzling 491 hours. The gradual rise in light from winter to summer paints a beautiful narrative of renewal, making each returning ray of sunshine in Porvoo’s enchanting landscapes all the more cherished.
In Porvoo, Finland, the chance of enjoying sunny weather in December is relatively low, standing at just 12%. This figure reflects a broader trend of diminishing sunlight as the year draws to a close, commencing from a notable 57% in the summer months. After peaking in July, the likelihood of sunny days begins a steady decline, hitting a low of 5% in January. December's chilly days can feel particularly gray, contrasting sharply with the increased sunlight earlier in the year, particularly from March to June, when sunshine becomes more frequent. As winter settles in, residents and visitors alike should prepare for a season largely marked by overcast skies rather than bright sunny scenes.
As the year draws to a close, December in Porvoo, Finland ushers in a stark contrast to the vibrant daylight of summer months. With only 5 hours of daylight, this month marks the shortest days of the year, a significant drop from the lush 18 hours of June and July. The gradual decline begins in August, where daylight slips to 15 hours, and continues its retreat through the autumn months. This trend reflects a natural rhythm as the sun's position lowers in the sky, leading to chilly, whimsical winters that embrace the enchanting Finnish landscape. As daylight dwindles, the beauty of Porvoo's winter charm emerges, inviting residents and visitors alike to appreciate the serene stillness of this picturesque town.
In December, Porvoo experiences a gentle average wind speed of 3.7 m/s (8 mph), reflecting a slight uptick from the previous month's 3.8 m/s. As winter sets in, the winds tend to calm compared to the brisk gusts of October, which recorded a higher speed of 4.5 m/s (10 mph). This transition showcases a broader trend throughout the year, where winds are typically stronger in the fall before tapering off into the calmer winter months. Interestingly, December’s winds are comparable to those witnessed in early spring, illustrating a consistent pattern of moderate breezes that accompany the enchanting, snowy landscapes of Porvoo. The rhythm of wind speeds creates a picturesque backdrop, making the charm of the season all the more captivating.
Weather in Porvoo varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Porvoo, focusing on differences in temperature, rainfall, humidity, and UV levels.
December and January weather exhibit notable differences, despite both being winter months. In December, temperatures range from a minimum of -20°C (-3°F) to a maximum of 7°C (44°F), with an average of -1°C (30°F). This month also sees a substantial amount of precipitation, totaling 73 mm (2.9 in) over 16 days, and a humidity level of 96%.
In contrast, January tends to be slightly colder, with temperatures dropping to a low of -25°C (-13°F) and reaching a maximum of 8°C (47°F), leading to an average temperature of -3°C (27°F). While January has less precipitation—54 mm (2.1 in) over 11 days—it experiences slightly higher humidity at 98%. For a more detailed look at the weather, visit Porvoo weather in January.
In December, the weather is typically chilly with temperatures ranging from a minimum of -20°C (-3°F) to a maximum of 7°C (44°F), averaging around -1°C (30°F). It sees a fair amount of precipitation, totaling 73 mm (2.9 in) over about 16 days, while maintaining a high humidity level of 96%. In contrast, February is slightly colder with minimum temperatures dropping to -25°C (-13°F) and an average temperature of -4°C (25°F), though it can reach up to 8°C (46°F). Precipitation decreases to 48 mm (1.9 in) over 10 days, yet the humidity remains constant at 96%. For a closer look at February weather in Porvoo, check out Porvoo weather in February.
In December, temperatures in Porvoo can dip as low as -20°C (-3°F), with an average of around -1°C (30°F) and a maximum of 7°C (44°F). The month sees significant precipitation, totaling 73 mm (2.9 in) over 16 days, accompanied by high humidity levels at 96%. In contrast, March experiences slightly colder minimum temperatures, dropping to -23°C (-10°F), but with a maximum reaching 13°C (55°F), and similar average temperatures of -1°C (30°F). Precipitation decreases to 49 mm (1.9 in) over 12 days, accompanied by a lower humidity level of 93%. For more detailed insights, you can visit Porvoo weather in March.
December and April present markedly different weather conditions. In December, temperatures can drop to a chilling -20°C (-3°F), with an average of -1°C (30°F) and a maximum of 7°C (44°F). The month experiences substantial precipitation, totaling 73 mm (2.9 in) over 16 days, accompanied by high humidity levels at 96%. In contrast, April sees milder temperatures, ranging from a minimum of -14°C (7°F) to a comfortable maximum of 21°C (70°F) and an average of 4°C (40°F). Precipitation also decreases to 48 mm (1.9 in) over just 11 days, with humidity levels dropping to 87%. For more detailed information on the weather in April, you can visit Porvoo weather in April.
December and May present strikingly different weather conditions. In December, temperatures can plunge as low as -20°C (-3°F) and average around -1°C (30°F), with highs only reaching up to 7°C (44°F). The month typically experiences significant humidity at 96%, along with 73 mm (2.9 in) of precipitation spread over 16 days, creating a chilly and damp atmosphere. In contrast, May offers a much milder climate, with minimum temperatures around -4°C (26°F) and an average of 11°C (51°F), peaking at a warm 29°C (84°F). Precipitation decreases to 50 mm (2.0 in) over just 10 days, and humidity drops to 75%, allowing for more comfortable outdoor conditions. For more specific insights into May weather, you can check out Porvoo weather in May.
The weather in December is characterized by cold temperatures, with average lows reaching -20°C (-3°F) and highs only rising to 7°C (44°F). Additionally, it experiences significant humidity levels at 96%, coupled with 73 mm (2.9 in) of precipitation spread over 16 days. In contrast, June offers a much milder climate, with average temperatures ranging from 2°C (35°F) to a warm 32°C (89°F), and an average of 17°C (62°F). Precipitation is lower in June at 56 mm (2.2 in) over just 11 days, and the humidity drops to a more comfortable 74%. For more details, visit Porvoo weather in June.
December and July present starkly contrasting weather conditions. In December, temperatures can plunge as low as -20°C (-3°F), with an average around -1°C (30°F) and a maximum of 7°C (44°F). This month also sees notable precipitation of 73 mm (2.9 in) over 16 days, accompanied by high humidity levels at 96%. In contrast, July experiences much milder weather, with temperatures ranging from a minimum of 7°C (44°F) to a maximum of 32°C (89°F), averaging around 18°C (65°F). Precipitation in July is slightly lower at 71 mm (2.8 in) over 12 days, and humidity is at a more comfortable 80%. For more specific details about the weather in July, visit Porvoo weather in July.
December and August present strikingly different weather patterns, reflecting the shift from winter to summer. In December, temperatures can plummet to a chilling minimum of -20°C (-3°F), with an average of -1°C (30°F) and a maximum of 7°C (44°F). The month also sees significant precipitation over 16 days, with humidity levels reaching 96%. In contrast, August offers a much milder climate, featuring comfortable temperatures that range from a minimum of 6°C (43°F) to a maximum of 31°C (87°F), with an average of 16°C (62°F). Although August experiences slightly higher precipitation at 78 mm (3.1 in) over just 12 days, the humidity remains lower at 85%. For those interested in exploring the nuances of Porvoo's climate, you can find more details at Porvoo weather in August.
December and September present stark contrasts in weather patterns. In December, temperatures plummet, with minimums dipping to -20°C (-3°F) and an average temperature of -1°C (30°F), while precipitation occurs over 16 days, totaling 73 mm (2.9 in) and accompanied by high humidity levels at 96%. Conversely, September enjoys milder conditions, with minimum temperatures around -2°C (29°F) and a comfortable average of 12°C (53°F), peaking at a maximum of 24°C (75°F). Precipitation in September is slightly lower at 63 mm (2.5 in) over 12 days and humidity stands at 90%. For a more detailed look at September's weather, you can explore Porvoo weather in September.
In comparing the weather of December and October, it's evident that December is significantly colder, with average temperatures hovering around -1°C (30°F) compared to October's milder average of 7°C (44°F). The minimum temperatures in December can plummet to -20°C (-3°F), whereas October's minimum is a more tolerable -5°C (23°F). Precipitation levels are fairly similar, with December receiving 73 mm over 16 days and October slightly higher at 80 mm over 15 days. Humidity is also slightly elevated in December at 96%, compared to October's 94%. For more detailed insights into October weather, you can visit Porvoo weather in October.
December weather in Porvoo is characterized by significantly colder temperatures compared to November. While November experiences a minimum temperature of -8°C (18°F) and an average of 3°C (37°F), December plunges to a minimum of -20°C (-3°F) and an average temperature of -1°C (30°F). Additionally, December sees increased precipitation, reaching 73 mm (2.9 in) over 16 days, compared to November's 56 mm (2.2 in) over 12 days. Humidity levels are quite high in both months, with December reaching 96% and November at 94%. For more details on November's climate, you can check Porvoo weather in November.
As December settles over Porvoo, the weather transforms into a chilly embrace, marking a notable shift from the milder months of autumn. This month boasts a maximum temperature that barely reaches a cool 7°C, while the average dips significantly to around -1°C, with nighttime lows plummeting to quite nippy -20°C. The elevated humidity levels, hovering around a brisk 96%, combined with an increase in precipitation, make for a distinctly damp atmosphere, with about half the month seeing rain or snow. This stark contrast sets December apart as a time of wintery charm, offering unique opportunities to experience the rich beauty of Porvoo's snowy landscapes. For more insights into how the weather evolves throughout the year, explore Porvoo Climate.