Last updated: October 30, 2025
January in Seongsu, South Korea presents a unique winter experience, with temperatures varying significantly from a maximum of 16°C (60°F) to a chilling minimum of -19°C (-2°F), averaging around -1°C (31°F). Residents can expect 29 mm (1.1 in) of precipitation over five days, contributing to a 71% humidity level that envelopes the city. This combination of cold temperatures and occasional wet weather creates a crisp yet invigorating atmosphere, perfect for exploring Seongsu's vibrant streets and cozy cafés.
In January, Seongsu, South Korea, experiences a dramatic range of temperatures, with lows plunging to -19°C (-2°F) and a modest average of -1°C (31°F). The month presents a crisp chill that gives way to occasional warmer peaks, reaching up to 16°C (60°F), hinting at the transition from winter to spring. As February approaches, temperatures remain relatively low but start to rise slightly, with minimums of -14°C (7°F) and maximums climbing to 22°C (71°F), demonstrating an upward trend as the seasons shift. This early increase in warmth paves the way for March's gradual thaw, where average daily temperatures continue to rise, marking the first signs of spring—showcasing Seongsu's dynamic temperature fluctuations as the cold grip of winter loosens its hold.
In January, Seongsu, South Korea experiences relatively modest precipitation, totaling 29 mm (1.1 in) spread across just 5 days. This marks the beginning of a gradual increase in rainfall as the year progresses; February sees a slight uptick to 39 mm (1.5 in), maintaining the same number of rainy days. The transition into spring brings a significant rise, with March and April recording 68 mm (2.7 in) and 63 mm (2.5 in), respectively, as the frequency of rainy days also increases. As summer arrives, precipitation peaks dramatically in July with 261 mm (10.3 in), showcasing the rainy season's intensity, before tapering off in the fall months. Overall, January sets the stage for a pattern of increasing moisture in the months to come, transitioning from the dry winter into a much wetter climate.
In January, Seongsu, South Korea experiences an average humidity of 71%, which sets the stage for a distinct seasonal trend. As winter transitions into spring, humidity levels gradually decrease, reaching their lowest point of 67% in March. However, this respite is short-lived; the approach of summer brings a notable increase in humidity, skyrocketing to a peak of 95% in July. This pattern highlights a significant rise in moisture, with August still retaining a high level at 93%. As the year progresses into autumn, humidity begins to decline again, stabilizing around 78% in October and dropping to 76% in November. Ultimately, Seongsu's humidity levels paint a vivid picture of the region's seasonal shifts, where winter's chill gives way to sultry summers before yielding to the crisp air of fall.
In January, Seongsu, South Korea, experiences a moderate UV Index of 4, with a burn time of 30 minutes. As the months progress into February, the UV Index rises slightly to 5, maintaining that moderate exposure level. March marks a noticeable shift, with the index jumping to 7, indicating a high risk of harm from unprotected sun exposure and a reduced burn time of 25 minutes. This upward trend continues as April brings an even higher index of 10, categorized as very high, reducing burn time further to 15 minutes. The peak months of June through August reach an extreme UV Index of 12, where skin can burn within 10 minutes of exposure. As summer fades into fall, the UV levels start to decline, dropping to 7 in October and a moderate 5 by November. The year closes with December's index at a lower 3, still indicating a cautious approach is needed when outdoors. For more detailed insights on UV exposure in Seongsu, visit Seongsu UV Index.
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In January, Seongsu experiences a modest 192 hours of sunshine, setting the stage for a gradual increase in luminosity as the months progress. February welcomes a rise to 238 hours, hinting at the early stirrings of spring. By March, sunshine peaks significantly to 277 hours, and as April unfolds, it reaches 283 hours, showcasing a clear trend towards warmer days. This upward trajectory continues through May, where basking in 304 hours of sunlight becomes the norm, creating a vibrant atmosphere that lingers into the consistently sunny June with 302 hours. However, as summer peaks in July with 272 hours, a slight dip occurs, followed by a bounce back in August at 286 hours. The autumn months bring a graceful descent as sunshine hours gently decline through September, October, and November, ending the year in December with a respectable 235 hours. This annual journey of sunshine reflects the dynamic weather patterns of Seongsu, blending nature’s rhythms with the beauty of seasonal transitions.
In Seongsu, South Korea, January boasts a 41% chance of sunny weather, marking a noteworthy contrast to the subsequent month, February, which sees an increase to 47%. This slow rise continues into early spring, with March recording a dip at 37% before stabilizing again in April with a return to 41%. Notably, the likelihood of sunshine tends to diminish as summer approaches, peaking in the wettest months from June to July, where it drops to as low as 21%. Interestingly, the trend shifts again in the latter part of the year; by October, the chance of sun increases to 51%, suggesting a delightful return of clearer skies as the year draws to a close. Overall, while January offers a fair shot at sunshine, it also sets the stage for a dynamic weather pattern that gradually evolves as each month progresses.
In January, Seongsu, South Korea, experiences about 10 hours of daylight, setting the tone for a winter month where shorter days dominate. As February rolls in, daylight remains steady at 10 hours, hinting at the lingering winter chill. However, with the arrival of March comes a yearning for longer days, as sunlight increases to 11 hours. This trend continues into the spring, with April basking in 13 hours of daylight—an inviting prelude to warmer months. May and June peak at 14 hours, allowing residents to fully enjoy the vibrant blooms of spring and the sunny days of early summer. As summer shifts to fall, daylight begins to wane, gradually descending to 13 hours in August and tapering off to 12 hours in September, before settling back at 11 hours in October. November and December bring shorter days once again, with daylight dwindling to 10 and 9 hours, respectively, marking a return to the serene stillness of winter. This cyclical dance of daylight throughout the year illustrates Seongsu's annual rhythm, evoking a sense of anticipation with each seasonal change.
In Seongsu, South Korea, January ushers in a brisk yet manageable average wind speed of 2.8 m/s (6 mph), setting the tone for the winter months ahead. As the seasons transition, the winds pick up slightly in February to 3.1 m/s (7 mph), offering a taste of invigorating breezes. However, by March, the winds mellow again to 2.4 m/s (5 mph), reflecting a trend of fluctuating conditions as the area moves toward spring. Consistent wind speeds return in April and May, each at 2.8 m/s (6 mph), before summer brings a noticeable dip, with July and August plummeting to just 1.9 m/s (4 mph). This lighter wind pattern continues into the early fall, before gradually increasing again to 2.4 m/s (5 mph) in September and November. By December, the winds rise slightly to 2.7 m/s (6 mph), hinting at the approach of winter once more. Overall, the January winds serve as a reminder of the dynamic weather patterns that characterize Seongsu's climate throughout the year.
Weather in Seongsu varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Seongsu, focusing on differences in temperature, rainfall, humidity, and UV levels.
In January, temperatures can plunge as low as -19°C (-2°F), with an average of -1°C (31°F) and a maximum reaching 16°C (60°F). The month sees a total precipitation of 29 mm (1.1 inches) over five days, accompanied by a humidity level of 71%. In contrast, February offers a slightly milder climate, with minimum temperatures around -14°C (7°F) and an average of 1°C (34°F), peaking at 22°C (71°F). This month experiences a bit more rainfall at 39 mm (1.5 inches), also over five days, but with a slightly lower humidity of 68%. For more details on February weather conditions, check out Seongsu weather in February.
In January, temperatures can be quite frigid, with a minimum of -19°C (-2°F) and an average of -1°C (31°F), while highs reach a milder 16°C (60°F). The month experiences relatively low precipitation at 29 mm (1.1 in) over about 5 days, combined with a humidity level of 71%. In contrast, March sees a notable warming trend, with minimum temperatures rising to -5°C (24°F) and an average of 7°C (45°F), peaking at a maximum of 23°C (74°F). Precipitation increases significantly to 68 mm (2.7 in) over 8 days, and humidity decreases slightly to 67%. For a more detailed outlook on March weather, visit Seongsu weather in March.
In January, the weather is characterized by extremely cold temperatures, with minimums dropping to -19°C (-2°F) and an average of -1°C (31°F), making it a stark contrast to the more temperate conditions of April. The maximum temperature in January reaches only 16°C (60°F), while April sees a significant rise, with minimums of -2°C (29°F) and maximums soaring to 28°C (83°F). Additionally, April experiences increased precipitation, totaling 63 mm (2.5 in) over 7 days, compared to January’s 29 mm (1.1 in) over just 5 days. Humidity also rises slightly from 71% in January to 78% in April, contributing to a more humid atmosphere. For a detailed look at April weather, check out Seongsu weather in April.
January and May present striking contrasts in weather. January is characterized by frigid temperatures, with a minimum of -19°C (-2°F) and an average of -1°C (31°F), while the month can occasionally reach a mild 16°C (60°F). In terms of precipitation, January sees around 29 mm (1.1 in) over approximately 5 days, accompanied by a humidity level of 71%. In contrast, May ushers in warmth, with minimum temperatures around 3°C (38°F) and average highs of 18°C (64°F) to a peak of 30°C (86°F). It also experiences higher precipitation, totaling 90 mm (3.5 in) across about 9 days, accompanied by an increased humidity of 85%. Thus, while January embodies the chill of winter, May marks the vibrancy of spring. For more detailed insights on May weather, visit Seongsu weather in May.
In January, the weather is characterized by frigid temperatures, with a minimum of -19°C (-2°F), an average of -1°C (31°F), and a maximum of 16°C (60°F). The month sees a low level of precipitation at 29 mm (1.1 in) over 5 days, while the humidity rests at a moderate 71%. In stark contrast, June brings warmth and increased moisture, featuring a minimum temperature of 10°C (51°F), an average of 22°C (71°F), and a peak at a sweltering 33°C (91°F). Precipitation jumps to 131 mm (5.2 in) over 10 days, with humidity rising to a sultry 87%. For a closer look at the June weather patterns, check out Seongsu weather in June.
January and July present a stark contrast in weather conditions. In January, temperatures can plummet to a minimum of -19°C (-2°F), with an average temperature around -1°C (31°F) and only a handful of precipitation days totaling 29 mm (1.1 in) throughout the month. The humidity level sits at a moderate 71%, making the cold feel more biting. In stark contrast, July experiences much warmer temperatures, with a minimum of 17°C (62°F) and an average of 25°C (77°F), peaking at a hot 35°C (95°F). The month sees significantly higher rainfall, accumulating 261 mm (10.3 in) over 17 days, paired with high humidity levels of 95%. Such differences between the two months highlight the extreme seasonal variations in weather, for more details about July weather, you can check Seongsu weather in July.
January and August present stark contrasts in weather. In January, temperatures can plunge to a chilling minimum of -19°C (-2°F), with an average of -1°C (31°F) and highs reaching only 16°C (60°F). Precipitation is relatively low at 29 mm (1.1 in) over just five days, and humidity hovers around 71%. In contrast, August boasts much milder conditions, with temperatures ranging from a minimum of 14°C (58°F) to a sweltering maximum of 37°C (99°F), averaging 26°C (79°F). However, it is also significantly wetter, with total precipitation of 214 mm (8.4 in) spread over 17 days and humidity levels soaring to 93%. For more details, you can check Seongsu weather in August.
In January, the weather is quite cold, with temperatures ranging from a chilling -19°C (-2°F) at night to a milder max of 16°C (60°F) during the day, and an average of -1°C (31°F). Precipitation is relatively low at 29 mm (1.1 in) over just 5 days, and the humidity sits at 71%. In contrast, September boasts much warmer conditions, with temperatures varying from a minimum of 8°C (48°F) to a maximum of 31°C (88°F) and averaging around 21°C (70°F). The month experiences more rainfall, totaling 201 mm (7.9 in) across 11 days, and humidity increases to 80%. For more details about the weather in September, you can visit Seongsu weather in September.
In January, temperatures can plummet to a chilling minimum of -19°C (-2°F), with an average of -1°C (31°F) and a maximum reaching 16°C (60°F). The month typically sees about 29 mm (1.1 in) of precipitation, spread over 5 days, accompanied by a humidity level of 71%. In contrast, October brings much milder weather, with temperatures ranging from a minimum of 0°C (32°F) to a pleasant average of 14°C (58°F) and a maximum soaring to 30°C (86°F). Additionally, October experiences higher precipitation at 67 mm (2.6 in) over the same number of rainy days, along with a slightly elevated humidity of 78%. For a detailed look at October's weather in Seongsu, you can refer to Seongsu weather in October.
January weather is characterized by significantly colder temperatures, with a minimum of -19°C (-2°F) and an average of -1°C (31°F), while November offers a milder climate, with temperatures ranging from a minimum of -4°C (26°F) to an average of 8°C (46°F). In January, the maximum temperature can reach up to 16°C (60°F), contrasting with November’s warmer peak of 21°C (70°F). Precipitation levels are also noteworthy; January sees about 29 mm (1.1 in) over 5 days, while November records higher precipitation at 42 mm (1.6 in) across 6 days. The humidity is slightly higher in November at 76%, compared to January's 71%. For a detailed look at November weather, refer to Seongsu weather in November.
In comparing the weather between January and December, January experiences slightly cooler temperatures, with an average of -1°C (31°F), compared to December's average of 1°C (34°F). The minimum temperature in January can drop to -19°C (-2°F), making it noticeably colder than December’s minimum of -13°C (8°F). Both months see similar precipitation levels, with January receiving 29 mm (1.1 in) and December 31 mm (1.2 in), each over the course of five days. Humidity levels are also quite comparable, at 71% for January and 73% for December, contributing to the overall chilly atmosphere of both months. For more specific details, you can refer to Seongsu weather in December.
As January rolls into Seongsu, the weather transforms dramatically, offering a notable chill that sets it apart from other months. With average temperatures hovering around -1°C (31°F), this month presents a stark contrast to the milder seasons, making it essential for visitors to bundle up. Precipitation is relatively low, with only about 29 mm spread over five days, although the 71% humidity can make the cold feel even more penetrating. This unique combination of low temperatures and moderate moisture creates a brisk winter ambiance that captures the serene beauty of Seongsu during this time. For a more detailed look at what to expect throughout the year, visit Seongsu Climate.