Last updated: October 30, 2025
January in Incheon, South Korea presents a chilly yet captivating winter experience. With average temperatures hovering around -2°C (29°F), residents and visitors alike can expect to encounter maximums of 12°C (54°F) and minimums plummeting to -16°C (3°F). The humidity level sits at a brisk 71%, complementing the season's crisp air. Precipitation is relatively low, with only 17 mm (0.7 in) measured over a mere 2 days, allowing for plenty of clear moments to enjoy the winter landscape. Whether exploring the city's cultural offerings or embracing outdoor activities, January in Incheon invites a blend of excitement and serene beauty.
In January, Incheon, South Korea, experiences its coldest temperatures of the year, with lows plummeting to -16°C (3°F) and an average hovering around -2°C (29°F). Daytime highs can reach a mild 12°C (54°F), providing a stark contrast to the frigid nights. As the month progresses into February, a slight warming trend is evident, with average temperatures inching up to 0°C (32°F). This pattern continues into early spring, with March welcoming milder days, averaging 6°C (44°F), before spring truly blossoms in April. By the time May arrives, temperatures rise significantly, with averages climbing to 17°C (63°F), signaling a shift toward warmer weather. Overall, January marks a chilly start to the year, setting the stage for the gradual transition into more temperate months, reflective of Incheon’s dynamic seasonal changes.
In January, Incheon experiences a relatively low precipitation level of just 17 mm (0.7 in), occurring over only 2 days. This sets the stage for the drier winter months, with precipitation gradually increasing as the year progresses. February sees a slight uptick to 21 mm (0.8 in), but the pattern shifts dramatically by March, where rainfall surges to 44 mm (1.7 in), spreading across more days. As the spring months unfold, April and May bring considerably higher totals of 49 mm (1.9 in) and 107 mm (4.2 in) respectively, indicative of the transitioning climate. This trend continues into the summer, peaking in July and August with staggering figures of 232 mm (9.1 in) and 256 mm (10.1 in), often sustained over over two weeks of rainfall. As the year draws to a close, precipitation recedes, leading to a final dip in December, which echoes January's low levels with 24 mm (0.9 in) across 5 days. Overall, Incheon’s precipitation pattern illustrates a clear seasonal rhythm, transitioning from dry winter months to a lush, wet summer.
In January, Incheon, South Korea, experiences a humidity level of 71%, setting the stage for a generally moist winter atmosphere. This figure marks the beginning of a gradual trend towards higher humidity, as the months progress into spring and summer. While February and March see a slight drop to 65%, the humidity begins to rise significantly in April, reaching 75%. As summer approaches, the city experiences peak humidity levels, soaring to an impressive 91% in both July and August. Following this, a gradual decline occurs, with September dropping to 77%. The autumn months, October and November, maintain elevated humidity around 79% to 80%, before settling back to a more moderate 74% in December. This cyclical pattern highlights the transition from chilly winters to steamy, humid summers, making Incheon a city of diverse seasonal climates.
In January, Incheon, South Korea, experiences a moderate UV Index of 3, indicating that while sun exposure can be enjoyed, caution is still advisable; with a burn time of 30 minutes. As the months progress, we see a gradual increase in UV intensity peaking in the summer. By March, the UV Index rises to 6 (high), decreasing burn time to just 25 minutes, and by April, it escalates to 8 (very high), shortening safe exposure further to 15 minutes. The following months bring extreme conditions, with the UV Index reaching 11 in July and August, where the burn time plummets to an alarming 10 minutes. As summer transitions to autumn, the UV Index starts to decline, resting back at 4 in November, and returning to 3 in December, prompting a more relaxed approach to sun safety. For detailed insights into UV trends, check the Incheon UV Index.
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In Incheon, South Korea, the month of January experiences a modest 199 hours of sunshine, setting the stage for a gradual increase in radiant days as the year progresses. February sees a notable rise to 242 hours, hinting at the transition towards spring, which blossoms into extended daylight by March with 282 hours. The trend continues upward, peaking in June at 317 hours, showcasing summer's warmth and brightness. However, as the seasons shift, sunshine hours begin to taper off, with July and August still boasting impressive totals of 294 and 289 hours respectively. By September and October, the decline is more pronounced, leading to 231 hours in November and 235 hours in December. This yearly cycle of sunlight underscores Incheon’s vibrant seasonal variations, inviting residents and visitors alike to bask in the beauty of its sunny days.
In Incheon, South Korea, January boasts a 52% chance of sunny weather, marking a notable peak compared to the subsequent months, especially the cooler spring season. As February starts to roll in, the likelihood of sunshine increases slightly to 55%, hinting at a gradual transition toward milder conditions. However, by the time March arrives, this sunny likelihood dips to 44%, suggesting a shift into more unpredictable weather as winter lingers. Interestingly, the trend showcases that as the year progresses towards the warmer months of November and December, the chances of sunny days significantly rise, with December reaching 63%. This pattern highlights Incheon’s dynamic climate, where January can surprise with its sunlit days before moving into a predominantly overcast spring.
In Incheon, South Korea, the daylight duration undergoes a noticeable transformation throughout the year, beginning with 9 hours in January. As winter gives way to spring, daylight steadily increases, reaching 11 hours by March and blooming into 13 hours in April. This upward trend peaks at 14 hours in both May and June, offering the longest days of the year, ideal for outdoor activities and exploration. However, as summer fades, the daylight gradually wanes, tapering to 12 hours in September and returning to 10 hours by November. This seasonal ebb and flow culminates in December, where daylight falls back to 9 hours, mirroring the darkness of January, thus completing a beautiful cycle of light that reflects the rhythm of nature throughout the seasons.
In Incheon, South Korea, January ushers in a brisk start to the year with an average wind speed of 3.4 m/s (8 mph), mirroring December's breezy conditions. This lively wind pattern sets the tone for the winter months, as January's winds are a touch stronger than those in March and April, where speeds dip to an average of 2.9 m/s (7 mph) and 3.2 m/s (7 mph), respectively. However, as spring approaches, the winds gradually pick up again, peaking in February at 3.7 m/s (8 mph). The gentle summer months see a decline, with July offering some of the lightest breezes at an average of 2.3 m/s (5 mph). Overall, the data reveals a playful fluctuation in wind speeds throughout the year, enhancing Incheon’s dynamic seasonal character.
Weather in Incheon varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Incheon, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February present distinct weather patterns, with January typically exhibiting colder temperatures. In January, temperatures range from a minimum of -16°C (3°F) to a maximum of 12°C (54°F), with an average of -2°C (29°F) and a relatively high humidity of 71%. In contrast, February sees slightly milder temperatures, with a minimum of -14°C (6°F) and a maximum of 15°C (59°F), resulting in an average temperature of 0°C (32°F). While both months experience low levels of precipitation, February records a bit more, totaling 21 mm (0.8 in) over four days compared to January’s 17 mm (0.7 in) over just two days. For a more detailed overview, you can check Incheon weather in February.
January weather in Incheon features colder temperatures, with a low of -16°C (3°F) and an average of -2°C (29°F), while it peaks at 12°C (54°F). This month sees limited precipitation, totaling just 17 mm over 2 days, alongside a relatively high humidity of 71%. In contrast, March brings a noticeable warming trend, where temperatures range from a minimum of -6°C (21°F) to an average of 6°C (44°F), and can reach up to 19°C (66°F). The month experiences more precipitation at 44 mm over 5 days, with humidity decreasing slightly to 65%. For more detailed information, you can check Incheon weather in March.
January and April present a stark contrast in weather conditions. In January, temperatures can plunge to a minimum of -16°C (3°F) with an average around -2°C (29°F), while the maximum only reaches 12°C (54°F). The month sees minimal precipitation at 17 mm (0.7 in) over just two days, coupled with a humidity level of 71%. In contrast, April enjoys much milder temperatures, where the minimum is 1°C (33°F) and the average climbs to 12°C (54°F), peaking at a warm 25°C (78°F). Precipitation increases to 49 mm (1.9 in) across six days, and humidity rises slightly to 75%. For more details, check out Incheon weather in April.
In January, the weather is typically cold and crisp, with temperatures ranging from a brisk -16°C (3°F) at night to a mild 12°C (54°F) during the day. The month sees minimal precipitation, with just 17 mm (0.7 in) over a couple of days, and humidity levels around 71%, contributing to a dry chill in the air.
In contrast, May brings a significant shift with warmer temperatures, where nighttime lows start at 7°C (44°F) and daytime highs can reach as much as 28°C (82°F). This month experiences much more rainfall, totaling 107 mm (4.2 in) across eight days, and with humidity levels rising to 81%, the air feels distinctly more humid and vibrant. For a detailed look at what to expect during this warmer month, you can check Incheon weather in May.
The weather in January and June presents a stark contrast, with January marked by cold temperatures, where the minimum can drop to -16°C (3°F) and the average sits around -2°C (29°F). Precipitation is minimal, occurring only on two days, contributing to a humidity level of 71%. In comparison, June enjoys much warmer temperatures, with averages rising to 22°C (71°F) and maximums reaching 31°C (88°F). Rain is more prevalent in June, with 77 mm (3.0 in) of precipitation over nine days and humidity increasing to 85%. For more details on the June weather in Incheon, you can visit Incheon weather in June.
January and July showcase starkly contrasting weather conditions. In January, temperatures range from a chilling minimum of -16°C (3°F) to a maximum of 12°C (54°F), with an average of -2°C (29°F). The month sees low precipitation of 17 mm (0.7 in) over just two days, accompanied by a humidity level of 71%. In contrast, July experiences a much warmer climate, with temperatures fluctuating between a minimum of 19°C (66°F) and a maximum of 35°C (95°F), resulting in an average of 26°C (78°F). Precipitation increases dramatically to 232 mm (9.1 in) over 14 days, and the humidity rises to a steamy 91%. For a deeper dive into the specifics of July weather, you can check Incheon weather in July.
January and August present starkly contrasting weather conditions. In January, temperatures can drop as low as -16°C (3°F), with an average temperature of -2°C (29°F) and a maximum of 12°C (54°F). The month sees only 17 mm (0.7 in) of precipitation over just two days, with a humidity level of 71%. In sharp contrast, August experiences much warmer temperatures, ranging from a minimum of 17°C (63°F) to a maximum of 36°C (97°F), with an average of 27°C (80°F). This summer month is characterized by significantly higher precipitation, totaling 256 mm (10.1 in) across 15 rainy days, and a humidity level soaring to 91%. For more details on the summer experience, you can visit Incheon weather in August.
January and September in Incheon showcase contrasting weather patterns. January is characterized by cold temperatures, with a minimum of -16°C (3°F) and an average of -2°C (29°F), while September enjoys much milder conditions, ranging from a minimum of 11°C (53°F) to a comfortable average of 22°C (72°F), peaking at 31°C (87°F). Precipitation levels also differ significantly; January sees only 17 mm (0.7 in) over just 2 days, whereas September experiences a substantial increase, with 133 mm (5.2 in) falling over 9 days. Additionally, humidity is slightly higher in September at 77% compared to January's 71%. For more detailed insights into September's weather, you can visit Incheon weather in September.
In comparing January and October, there is a stark contrast in weather patterns. January features frigid temperatures, with a minimum of -16°C (3°F) and an average of -2°C (29°F), while October enjoys much milder conditions, boasting a minimum of 2°C (36°F) and an average of 15°C (60°F). Precipitation also varies significantly, with January receiving only 17 mm (0.7 in) over just 2 days, compared to October's 59 mm (2.3 in) spread over 6 days. Additionally, October is slightly more humid, with humidity levels at 79% compared to January's 71%. For a more detailed overview, check out Incheon weather in October.
In comparison to January, November experiences milder temperatures, with an average of 8°C (47°F) compared to January's average of -2°C (29°F). The minimum temperature in November is also significantly higher at -5°C (23°F), while January can plunge as low as -16°C (3°F). Additionally, November sees more precipitation, with 53 mm (2.1 in) over roughly five days, which is considerably more than January’s 17 mm (0.7 in) spread across just two days. Humidity levels are higher in November at 80%, compared to January's 71%. For more detailed insights, you can check Incheon weather in November.
January and December exhibit contrasting weather patterns, despite having similar maximum temperatures of 12°C (54°F). In January, the average temperature dips to -2°C (29°F), with a minimum of -16°C (3°F), making it slightly colder than December, which averages 0°C (33°F) and has a minimum of -14°C (7°F). Additionally, January experiences lesser precipitation, with only 17 mm (0.7 in) over 2 days, compared to December's 24 mm (0.9 in) over 5 days. Humidity levels are also somewhat lower in January at 71%, while December sees a humidity of 74%. For more detailed insights on December's weather, you can check Incheon weather in December.
January in Incheon presents a unique chill compared to the milder months of spring and autumn. With average temperatures hovering below freezing and occasional dips to -16°C, it stands apart as the coldest month of the year. The low levels of precipitation and high humidity can make the air feel even more biting. While other months may showcase more rain or warmth, January serves as a stark reminder of winter's grip. For those looking to understand the broader patterns of Incheon's climate, be sure to explore Incheon Climate.