Last updated: August 21, 2025
In January, Porvoo, Finland experiences a compelling blend of winter extremes, with temperatures ranging from a chilly -25°C (-13°F) to a peak of 8°C (47°F). The average temperature hovers around -3°C (27°F), making it a quintessential winter destination. With 54 mm (2.1 in) of precipitation over 11 days, visitors can expect frequent snow or rain, accompanied by remarkably high humidity levels of 98%. This unique weather creates a picturesque winter landscape, inviting exploration of Porvoo's charming streets and vibrant atmosphere.
In January, Porvoo, Finland, experiences its coldest depths, with temperatures dipping to a frigid min of -25°C (-13°F) and an average hovering around -3°C (27°F). Despite the chilling air, residents witness a varied range, as the mercury can climb to a mild max of 8°C (47°F). This stark contrast sets the tone for an icy month, where frosty landscapes define the beauty of this charming town. As winter lingers, temperatures gradually begin to shift, hinting at the approaching warmth of spring, with each month displaying a noticeable rise. By the end of January, though the cold persists, glimpses of moderation are undoubtedly celebrated as the days grow longer and the promise of milder weather looms.
In January, Porvoo experiences an average precipitation of 54 mm (2.1 in), spread over approximately 11 days of the month. This sets the stage for the winter season, with precipitation slightly increasing as the months progress into February and March, although February sees a modest dip to 48 mm. Interestingly, the overall trend reveals a gradual rise in rainfall as spring approaches, peaking at 80 mm in October. The distribution also highlights that while winter months tend to have fewer precipitation days, the summer months, particularly July and August, see a spike in both rainfall and rainy days, suggesting a distinct seasonal shift from light winter showers to more substantial summer downpours.
January in Porvoo, Finland, is characterized by a striking humidity level of 98%, making it one of the most moisture-laden months of the year. As winter progresses into February, humidity remains high at 96%, but begins a gradual decline through the spring months, dropping to 87% in April and 75% in May. This trend sharpens the contrast as summer arrives, with humidity levels slightly rising again in July to reach 80%, then peaking at 85% in August. Following this brief spike, the humidity begins its familiar descent into autumn, stabilizing around 90% in September and returning to the high 94% in October and November. By December, it closes the year with 96%, reminding us that the cycle of dampness persists year-round in this picturesque Finnish town.
In January, Porvoo, Finland, experiences a UV Index of 1, indicating low exposure risk with a burn time of 45 minutes. This low UV environment persists through February, maintaining the same index and burn time. However, as the seasons transition into spring, the UV Index begins to rise, reaching a moderate level of 3 in March and progressing to 4 by April, where burn times decrease to 30 minutes. May continues this trend, with the UV Index peaking at 5 and maintaining moderate exposure. The summer months see a significant shift, with both June and July recording a high UV Index of 7, where even short periods in the sun necessitate caution. As the year wanes, August and September revert back to moderate levels before dipping to low indices once again in October and remaining low through November and December. Overall, a noticeable seasonal trend can be observed in Porvoo's UV exposure, emphasizing the importance of sun safety as temperatures rise. For more detailed information, check out Porvoo UV Index.
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In Porvoo, Finland, the progression of daylight hours through the year paints a vivid picture of seasonal change. January begins with a modest 52 hours of sunshine, casting a soft light over the winter landscape, while February ushers in a significant increase to 151 hours, hinting at the sunny days to come. The momentum continues to build in March with 262 hours, as the days grow longer and spring begins to awaken the vibrancy of nature. By April, the sun shines brightly for 361 hours, setting the stage for the lushness of summer that follows. May to July showcases the peak sunshine, boasting an impressive 451 and 491 hours, respectively, enveloping Porvoo in warmth and light. As summer wanes, August still offers a generous 408 hours, but a gradual decline sets in with September's 289 hours marking the transition to shorter days. October and November see further reductions, with only 193 and 108 hours, narrowly escaping the long, dark winter months. Finally, December closes the cycle with a mere 53 hours, reminding us of the beauty in the return of light as the new year begins.
In Porvoo, Finland, January is a month where the sun tends to hide away, offering only a 5% chance of sunny weather. This starkly contrasts with the brighter months that follow, as February sees a slight increase to 15%, and by March, the likelihood of sunshine leaps to 37%. As spring approaches, the trend continues to rise dramatically, with April and May boasting sunny probabilities of 44% and 29%, respectively. The summer months shine the brightest, with July showcasing the peak at 57%. However, as the year winds down into autumn and winter, a noticeable decline returns, bringing a 12% chance in December. Overall, the data reveals a clear seasonal rhythm of increasing sun exposure, with a marked shift from the dim winter days to the vibrant sunshine of summer.
In January, Porvoo, Finland, experiences a brief daylight duration of just 6 hours, setting the stage for the slow return of sunlight as the year progresses. This gradual increase becomes evident in February with an uptick to 9 hours, followed by March, which enjoys 11 hours of daylight. The longer days are a welcome sign of spring, leading to an impressive 14 hours in April and even 17 hours by May. As summer reaches its peak in June and July, daylight stretches to a generous 18 hours, creating perfect conditions for outdoor activities. However, as the year transitions into late summer and autumn, daylight begins to wane. August sees a decline to 15 hours, followed by a more rapid drop-off through the fall, with December culminating in a mere 5 hours of light. This rhythmic cycle of daylight is both a hallmark of the Finnish climate and a testament to nature's unyielding rhythms, immersing residents in its beautiful shifts throughout the seasons.
In January, Porvoo, Finland greets the new year with an average wind speed of 3.4 m/s (8 mph), making it one of the calmer months relative to the gustier late autumn and early spring. As the seasons progress, February sees a slight dip to 3.1 m/s (7 mph), maintaining a gentle breeze that whispers through snow-laden streets. March introduces a refreshing uptick, with winds reaching 4.0 m/s (9 mph), hinting at the arrival of spring's invigorating energy. This trend of increasing wind speed continues through October, peaking at 4.5 m/s (10 mph), reflecting the intensifying forces of autumn's transition. However, just as the colder months settle in, we see a return to softer breezes in November and December, with averages of 3.8 m/s (9 mph) and 3.7 m/s (8 mph), respectively. Overall, January stands as a serene start to the year, gradually giving way to a dynamic dance of winds throughout the seasons.
Weather in Porvoo varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Porvoo, focusing on differences in temperature, rainfall, humidity, and UV levels.
In January, the weather is marked by chilly temperatures, with an average of -3°C (27°F) and a maximum of 8°C (47°F). The month experiences 54 mm of precipitation over 11 days, coupled with a high humidity level at 98%. Conversely, February sees a slight improvement in temperature, averaging -4°C (25°F), while still reaching a maximum of 8°C (46°F). The precipitation decreases to 48 mm over 10 days, and humidity drops slightly to 96%. Thus, while both months are cold and relatively wet, February holds a subtle edge in temperature and precipitation consistency. For a more detailed overview of February weather in Porvoo, you can visit Porvoo weather in February.
January and March present a notable shift in weather conditions, despite their proximity in winter. In January, temperatures typically range from a frigid -25°C (-13°F) as a minimum to a modest 8°C (47°F) as a maximum, with an average of -3°C (27°F). The month experiences heavy humidity at 98%, along with 54 mm (2.1 in) of precipitation over 11 days. In contrast, March sees slightly warmer temperatures, with a minimum of -23°C (-10°F) and a maximum reaching 13°C (55°F), averaging around -1°C (30°F). While precipitation is slightly lower at 49 mm (1.9 in) across 12 days, humidity decreases to 93%. For those interested in more details about the weather patterns during this month, you can find additional information here: Porvoo weather in March.
When comparing the weather in January and April, notable differences in temperature and humidity are evident. January experiences chilling temperatures with a minimum of -25°C (-13°F) and an average of -3°C (27°F), while April sees a significant rise, with minimums around -14°C (7°F) and an average of 4°C (40°F). The maximum temperatures in January reach only 8°C (47°F), in stark contrast to April's maximum of 21°C (70°F). Although both months have similar precipitation levels—54 mm (2.1 in) in January and 48 mm (1.9 in) in April—they differ in humidity, with January maintaining a high humidity of 98% compared to April's 87%. For more details on weather patterns in April, you can check Porvoo weather in April.
In January, the weather is characterized by frigid temperatures, with a minimum of -25°C (-13°F) and an average of -3°C (27°F), peaking at a maximum of 8°C (47°F). The month sees significant precipitation, totaling 54 mm (2.1 in) over approximately 11 days, accompanied by high humidity levels of 98%, creating a cold and damp atmosphere. In contrast, May offers a remarkable shift, with temperatures ranging from a minimum of -4°C (26°F) to a maximum of 29°C (84°F) and an average of 11°C (51°F). Precipitation slightly decreases to 50 mm (2.0 in) over 10 days, and humidity drops to a more comfortable 75%. For a detailed view of what to expect, check out Porvoo weather in May.
The weather in January is characterized by frigid temperatures, with minimums plunging to -25°C (-13°F) and an average of -3°C (27°F), while June sees a significant shift with temperatures ranging from a chilly minimum of 2°C (35°F) to a warm maximum of 32°C (89°F). Both months experience approximately equal levels of precipitation, with January receiving 54 mm (2.1 in) and June slightly more at 56 mm (2.2 in), but the humidity in January is remarkably high at 98%, making it feel even colder. In contrast, June has a much more comfortable humidity level of 74%. For a detailed overview of June weather conditions, you can check out Porvoo weather in June.
January and July present strikingly contrasting weather patterns. In January, temperatures can plunge as low as -25°C (-13°F), with an average of -3°C (27°F) and a maximum of 8°C (47°F). The month is characterized by high humidity at 98%, along with 11 days of precipitation totaling 54 mm (2.1 in). In stark contrast, July boasts milder conditions, where temperatures range from a minimum of 7°C (44°F) to an average of 18°C (65°F) and a peak of 32°C (89°F). It experiences slightly more precipitation at 71 mm (2.8 in) over 12 days, but the humidity is notably lower at 80%. These differences highlight the seasonal extremes experienced, making January cold and damp, while July is warm and relatively pleasant. For a more detailed look at the weather in July, you can check Porvoo weather in July.
January and August present starkly contrasting weather conditions. In January, temperatures dip significantly, with minimums reaching a chilling -25°C (-13°F) and average highs barely reaching 8°C (47°F). The month is characterized by high humidity at 98%, and with 54 mm of precipitation over 11 days, the landscape is often blanketed in snow. In sharp contrast, August experiences a milder climate, with minimum temperatures of 6°C (43°F) and average highs soaring to 31°C (87°F). This summer month sees slightly more precipitation at 78 mm spread over 12 days, but with much lower humidity at 85%. For those interested in understanding more about the summer conditions, you can find additional details here: Porvoo weather in August.
January and September present stark contrasts in weather. In January, temperatures plummet, with a minimum of -25°C (-13°F) and an average of -3°C (27°F), making it one of the coldest months of the year. The precipitation is relatively low at 54 mm (2.1 in), occurring over 11 days, while the humidity remains high at 98%. In contrast, September offers a much milder climate, with minimum temperatures around -2°C (29°F) and an average of 12°C (53°F), peaking at 24°C (75°F). The month sees slightly more precipitation at 63 mm (2.5 in) over 12 days, accompanied by a still moderate humidity of 90%. Overall, September’s weather is considerably more temperate and inviting compared to the frigid conditions of January. For more details, check Porvoo weather in September.
January and October present starkly contrasting weather patterns. In January, temperatures can plunge as low as -25°C (-13°F), with an average of -3°C (27°F) and a maximum of 8°C (47°F). The month is characterized by high humidity at 98% and receives about 54 mm (2.1 in) of precipitation over 11 days. In contrast, October sees milder temperatures ranging from a minimum of -5°C (23°F) to a maximum of 17°C (64°F), with an average of 7°C (44°F). This month experiences greater precipitation at 80 mm (3.2 in) over 15 days, coupled with a slightly lower humidity of 94%. For a more detailed overview of what to expect, check out Porvoo weather in October.
In January, temperatures plunge to a minimum of -25°C (-13°F) and see an average high of only 8°C (47°F), making it considerably colder than November, which experiences milder temperatures with a minimum of -8°C (18°F) and an average high of 12°C (54°F). Both months see similar amounts of precipitation, with January receiving 54 mm (2.1 in) over 11 days and November recording slightly more at 56 mm (2.2 in) across 12 days. Humidity levels are also high in both months, though January is slightly more humid at 98% compared to November's 94%. For more information about the weather specifics, you can check Porvoo weather in November.
In January, the weather tends to be colder compared to December, with average temperatures hovering around -3°C (27°F) and a minimum drop to -25°C (-13°F). While December features slightly milder conditions, with averages at -1°C (30°F), temperatures still dip to a minimum of -20°C (-3°F). Additionally, January experiences less precipitation, accumulating about 54 mm (2.1 in) over 11 days, compared to December's 73 mm (2.9 in) spread across 16 days. The humidity remains high in both months, with January at 98% and December slightly lower at 96%. For more detailed information about December weather, visit Porvoo weather in December.
January in Porvoo presents a striking contrast to the milder months, as the coldest month of the year envelops the town in a wintry chill. With temperatures often plummeting to lows well below freezing, residents and visitors alike experience a frigid atmosphere that is paired with high humidity, creating an icy landscape. The significant precipitation, spread over numerous days, often falls as snow, transforming Porvoo into a picturesque winter wonderland. This unique climate not only shapes daily life but also highlights the distinctive beauty of Porvoo in mid-winter. For a deeper dive into Porvoo's year-round weather patterns, check out Porvoo Climate.