Last updated: October 30, 2025
December in Incheon, South Korea brings a chill that defines the winter season. With maximum temperatures averaging around 12°C (54°F) and chilling down to a minimum of -14°C (7°F), residents and visitors alike experience a stark contrast that characterizes this month. The average temperature hovers around 0°C (33°F), creating a frosty atmosphere complemented by a 74% humidity level. Precipitation is relatively low, amounting to 24 mm (0.9 in) over approximately 5 days, making this month a mix of dry spells and cozy, wintry weather. Bundle up and enjoy the unique charm of Incheon in December!
In December, Incheon, South Korea, experiences a notable shift into winter's embrace, with temperatures dipping significantly. The month typically sees minimum temperatures around -14°C (7°F), while daytime averages hover at 0°C (33°F). This stark chill is complemented by a modest maximum of 12°C (54°F), hinting at the colder days that January will bring. As one of the coldest months of the year, December marks a transition from the milder temperatures of late autumn; indeed, the average temperature drops sharply from November's more temperate 8°C (47°F). The combination of frosty mornings and crisp afternoons calls for warm layers and a fondness for hot drinks, making it the perfect time to enjoy the festive atmosphere and cozy indoors amid Incheon's winter landscape.
In December, Incheon experiences a modest decline in precipitation compared to the wetter months of summer and early fall. The city receives an average of 24 mm (0.9 in) of rain over approximately five days, creating a more tranquil and less humid climate as winter sets in. This month marks a significant reduction from the peaks seen in July and August, where precipitation soared to 232 mm (9.1 in) and 256 mm (10.1 in), respectively. Despite the decrease, the steady convergence of cool temperatures and rainfall helps maintain the region's lush greenery, while residents can enjoy occasional clear skies interspersed with light showers. As the year closes, December serves as a gentle reminder of the transition into the drier winter months ahead.
In December, Incheon, South Korea, experiences a humidity level of 74%, marking a slight decrease from the wetter months of mid-summer. Following the peak humidity levels of 91% in both July and August, there's a gradual decline as the year winds down, with November recording an 80% average. As the region transitions into winter, December's humidity remains relatively high compared to the earlier months of the year, such as February and March, both at 65%. This seasonal pattern highlights the overall trend of increasing humidity from late spring through summer, followed by a steady decline as the climate cools, yet still retaining substantial moisture throughout the winter months.
In December, Incheon experiences a moderate UV Index of 3, which signifies a relatively low risk of harm from unprotected sun exposure. As the year comes to a close, this marks a noticeable decline from the extreme levels seen in the summer months, with burn times increasing back to a comfortable 30 minutes. This trend of fluctuating UV levels highlights the importance of adjusting sun safety practices according to the season. For those looking to plan their outdoor activities, December allows for more leisurely fun in the sun without the intense risk associated with the warmer months. To learn more about UV levels throughout the year, check out Incheon UV Index.
UV Risk Categories
Incheon, South Korea, basks in a steady embrace of sunlight throughout the year, with December shining brightly at 235 hours of sunshine. While this marks a decrease from the sun-drenched peak of June at 317 hours, December still holds its own in the latter half of the year. Notably, sunshine tends to wane slightly from November's 231 hours as winter approaches. Observing the trends, it’s clear that the late spring and summer months generously offer an abundance of sunlight, peaking in May and June, before gradually tapering off as the year ends. This gentle decline into winter’s embrace leaves December with a warm glow, ensuring that residents can still enjoy the charm of sunny days even as the chilly season sets in.
In December, Incheon, South Korea sees a notable increase in sunshine, with a 63% chance of sunny weather, marking a trend of improvement as the year comes to a close. This figure stands out compared to the preceding months, particularly when contrasted with the lower probabilities earlier in the year, such as 32% in July and 39% in June. Notably, November also experiences a surge in sunny days with a 61% chance, suggesting that the late autumn and early winter months have become increasingly favorable for sunshine. As the holiday season approaches, residents and visitors alike can look forward to more bright days, making December a delightful time to enjoy the winter landscape in Incheon.
In Incheon, South Korea, the rhythm of daylight presents a captivating dance throughout the year. As we transition into December, daylight decreases to a modest 9 hours, mirroring the shorter days of January. This seasonal pattern reveals a gradual buildup during the spring and summer months, peaking at 14 hours in late spring and summer before tapering off in the fall. By November, daylight has dropped to 10 hours, a clear signal of winter's approach. The cyclical nature of these changes not only paints a vivid picture of Incheon's climate but also enriches the local culture, encouraging a lifestyle that harmonizes with the natural ebb and flow of light.
As December arrives in Incheon, South Korea, the wind begins to pick up, with average speeds reaching 3.4 m/s (8 mph). This marks a notable increase from the summer months, where gentle breezes around 2.3 to 2.6 m/s (5 to 6 mph) characterized the season. The transition into winter brings a refreshing change, as winds become more brisk, comparable to those seen in January and February. Interestingly, the wind speeds during the latter part of the year—particularly November’s 3.1 m/s (7 mph) and December’s 3.4 m/s—highlight a subtle uptick, hinting at the invigorating chill of the season ahead. As the year closes, the December winds not only add a touch of crispness to the air but also signal the arrival of a wintry embrace in this vibrant city.
Weather in Incheon varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Incheon, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, temperatures in Incheon range from a minimum of -14°C (7°F) to a maximum of 12°C (54°F), with an average temperature of around 0°C (33°F). The month experiences about 24 mm (0.9 in) of precipitation over 5 days, contributing to a humidity level of 74%.
In contrast, January sees slightly colder temperatures, with a minimum of -16°C (3°F) and an average of -2°C (29°F), while the maximum remains the same at 12°C (54°F). Precipitation decreases to 17 mm (0.7 in) over just 2 days, and humidity drops slightly to 71%. For more detailed information, you can check Incheon weather in January.
In December, temperatures range from a minimum of -14°C (7°F) to a maximum of 12°C (54°F), with an average of 0°C (33°F). The month sees about 24 mm (0.9 in) of precipitation over approximately 5 days, and a humidity level of 74%. In contrast, February maintains a similar temperature range, with a minimum of -14°C (6°F) and a slightly higher maximum of 15°C (59°F), while the average remains steady at 0°C (32°F). February experiences a bit less precipitation at 21 mm (0.8 in) over just 4 days and lower humidity at 65%. For more detailed information on February weather, you can visit Incheon weather in February.
December weather features a colder climate with minimum temperatures plunging to -14°C (7°F) and an average of around 0°C (33°F). In contrast, March brings a noticeable warming trend, with minimum temperatures rising to -6°C (21°F) and average highs reaching 19°C (66°F). While December sees 24 mm (0.9 in) of precipitation over five days, March experiences increased precipitation at 44 mm (1.7 in) across the same number of days, though the humidity levels are slightly lower at 65% compared to December's 74%. For more detailed information, you can check Incheon weather in March.
In December, Incheon's weather is characterized by cold temperatures, with a minimum of -14°C (7°F) and an average around 0°C (33°F), while the maximum reaches only 12°C (54°F). The month sees approximately 24 mm (0.9 in) of precipitation over 5 days, and humidity levels hover around 74%. In contrast, April brings a significant warmth, with minimum temperatures rising to 1°C (33°F) and maximums reaching a pleasant 25°C (78°F). The average temperature in April climbs to 12°C (54°F), though the month experiences increased precipitation, totaling 49 mm (1.9 in) across 6 days, with humidity slightly higher at 75%. For a detailed outlook on April's weather, check out Incheon weather in April.
December weather is typically chilly, with temperatures ranging from a minimum of -14°C (7°F) to an average of 0°C (33°F), and peaking at a maximum of 12°C (54°F). This month experiences about 24 mm (0.9 in) of precipitation over approximately 5 days, accompanied by a humidity level of 74%.
In contrast, May heralds a much warmer climate, with temperatures ranging from a low of 7°C (44°F) to an average of 17°C (63°F), reaching highs around 28°C (82°F). Precipitation increases significantly to 107 mm (4.2 in) spread across 8 days, and humidity rises slightly to 81%. The contrast between the two months highlights a significant transition from the cold and dry winter of December to the warmer and wetter springtime of May. For more detailed information on May weather in Incheon, visit Incheon weather in May.
In comparing the weather of December and June, a stark contrast emerges. December experiences much colder temperatures, with a minimum of -14°C (7°F) and an average of 0°C (33°F), while June sees much warmer conditions, starting at a minimum of 14°C (57°F) and peaking at 31°C (88°F). Precipitation is also more significant in June, with 77 mm (3.0 in) over 9 days, compared to a drier December, which has only 24 mm (0.9 in) over 5 days. Additionally, humidity levels are higher in June at 85%, compared to December's 74%. For more detailed information on June weather, visit Incheon weather in June.
In December, temperatures in Incheon can drop as low as -14°C (7°F), with an average of 0°C (33°F) and a maximum of 12°C (54°F). The month is relatively dry, experiencing only 24 mm (0.9 in) of precipitation over about 5 days, accompanied by a humidity level of 74%. In stark contrast, July sees much warmer weather, with minimum temperatures starting at 19°C (66°F) and peaking at an average of 26°C (78°F), reaching highs of 35°C (95°F). Rainfall in July is significant, totaling 232 mm (9.1 in) across roughly 14 days, coupled with a higher humidity of 91%. For more details, check Incheon weather in July.
December and August present starkly contrasting weather conditions. In December, temperatures can drop as low as -14°C (7°F) and hover around an average of 0°C (33°F), with a maximum of only 12°C (54°F). The month experiences relatively low precipitation, totaling 24 mm (0.9 in) over about five days, accompanied by a humidity level of 74%. In contrast, August boasts a much warmer climate, with temperatures ranging from a minimum of 17°C (63°F) to an average of 27°C (80°F), and peaks reaching up to 36°C (97°F). The summer month is characterized by significantly higher rainfall, with 256 mm (10.1 in) spread across 15 days, and humidity soaring to 91%. For more details on the weather specifics, refer to Incheon weather in August.
December and September present stark contrasts in weather conditions. In December, temperatures can plummet as low as -14°C (7°F), with an average of 0°C (33°F) and a maximum of 12°C (54°F). The month is relatively dry, with only 24 mm of precipitation over 5 days and humidity at 74%. On the other hand, September offers much warmer temperatures, ranging from a minimum of 11°C (53°F) to a maximum of 31°C (87°F), and an average of 22°C (72°F). This month is significantly wetter, experiencing 133 mm of rainfall over 9 days, along with a slightly higher humidity of 77%. For more details on Incheon's September weather, check out Incheon weather in September.
When comparing the weather in December and October, it's clear that the two months present stark differences. December is much colder, with temperatures ranging from a minimum of -14°C (7°F) to a maximum of 12°C (54°F), leading to an average of 0°C (33°F). In contrast, October enjoys a mild climate with temperatures ranging from 2°C (36°F) to 28°C (82°F), averaging around 15°C (60°F). Precipitation also differs, with December receiving 24 mm (0.9 in) over five days, while October sees a higher total of 59 mm (2.3 in) spread across six days. Humidity levels in December stand at 74%, slightly lower than October's 79%. For more details on October's weather, check out Incheon weather in October.
In comparing the weather of December and November, December tends to be much colder, with average temperatures hovering around 0°C (33°F) compared to November's milder average of 8°C (47°F). The minimum temperature in December drops significantly to -14°C (7°F), while November's minimum is a more moderate -5°C (23°F). Interestingly, December experiences less precipitation overall, with 24 mm (0.9 in) compared to November's 53 mm (2.1 in), though both months see precipitation on about five days. Humidity levels also shift slightly, with December at 74% and November slightly higher at 80%. For those interested in more details, you can visit Incheon weather in November.
As December unfolds in Incheon, the weather takes a notable turn compared to the preceding months. Temperatures dip, with averages hovering around freezing and the potential for much colder nights, creating a chill that calls for cozy layers. Unlike the more humid summer months, December sees a decrease in precipitation, with only a handful of rainy days, yet the humidity remains relatively high, contributing to the crispness of the season. This unique blend of cold and moderate moisture creates a distinct atmosphere that is a hallmark of winter in Incheon. To learn more about how the climate shifts throughout the year, check out Incheon Climate.