Last updated: October 30, 2025
April in Incheon, South Korea ushers in a refreshing transition as temperatures range from a minimum of 1°C (33°F) to a delightful maximum of 25°C (78°F), with an average of 12°C (54°F). This month experiences 49 mm (1.9 in) of precipitation spread over approximately 6 days, making springtime both vibrant and occasionally damp. With relative humidity hovering around 75%, the air carries a refreshing moisture that enhances the beauty of blossoming flowers and lush greenery, embodying the spirit of renewal that defines the season.
In April, temperatures in Incheon, South Korea, experience a noticeable shift, welcoming the warmth of spring. The month begins with a minimum temperature of 1°C (33°F), gradually rising to a comfortable average of 12°C (54°F), and peaking at a delightful 25°C (78°F). This upward trend marks a significant improvement from the chill of winter, creating an inviting atmosphere perfect for outdoor activities and cherry blossom viewing. As the days become milder, residents and visitors alike can relish the vibrant blooms that signal a new season, making April a delightful time to explore the beauty of Incheon.
April in Incheon, South Korea, marks a notable shift in precipitation patterns, as rainfall begins to intensify with 49 mm (1.9 in) recorded across 6 days. This increase from March's 44 mm reflects the transition into a wetter season, signaling the approach of summer thunderstorms. The month stands out with a growing frequency of rainy days, as moisture accumulates before the deluges of May, which typically brings over double the rain. This rising trend not only underscores the importance of April as a prelude to the monsoon-like conditions that characterize the subsequent months but also highlights how the region’s climate shifts toward more sustained precipitation.
In April, Incheon, South Korea, experiences a noticeable rise in humidity, reaching 75%, which reflects the transition into warmer months. Following the steady levels of 65% seen in both February and March, April marks a shift, hinting at the impending summer humidity that peaks in the subsequent months. This increase is part of a broader trend, with humidity levels gradually climbing to 81% by May and soaring to 91% in the peak summer months of July and August. As the year progresses, humidity remains elevated, with only slight fluctuations in the fall, indicating a distinct seasonal pattern that characterizes Incheon’s climate.
As April unfolds in Incheon, South Korea, residents and visitors alike should be aware of the rising UV Index, which peaks at an impressive 8, categorized as very high. This spike marks a significant shift from the moderate levels experienced in the earlier months, with burn time decreasing to just 15 minutes—a stark contrast to January and February's more forgiving 30 minutes. As spring progresses, the UV Index not only rises in April but will escalate further, reaching 9 in May and 10 in June, signaling the approach of summer's extreme conditions. It’s essential to stay informed and protected during this time; for more detailed insights, check the Incheon UV Index.
UV Risk Categories
April in Incheon, South Korea, shines bright with 287 hours of sunshine, marking a delightful transition into spring. This month reflects a steady increase in sunlight, building on the growing momentum from March’s 282 hours. The ascent continues, with April's brightness leading seamlessly into May’s impressive 311 hours, signaling the approach of summer. This upward trend not only enhances the natural beauty of the region but also invites residents and visitors alike to enjoy outdoor activities and explore the vibrant landscape. As the year progresses, Incheon’s sunny disposition becomes a hallmark of its charm, encouraging everyone to bask in the warmth of its generous rays.
April in Incheon, South Korea, offers a moderate chance of sunny weather, sitting at around 45%. This marks a slight dip from March, which boasts a 44% chance of sunshine, highlighting a trend of fluctuating conditions as the seasons shift. While early spring can sometimes be unpredictable, it's noteworthy that this month is framed between higher probabilities in the preceding winter months and the increasing cloudiness of early summer. Looking ahead, the likelihood of sun decreases into the late spring, dropping to 39% in both May and June. Those planning outdoor activities in April can expect a fair balance of sun and shade as the region transitions toward warmer days.
As April unfolds in Incheon, South Korea, residents bask in an inviting 13 hours of daylight, marking a significant increase from the 11 hours enjoyed in March. This upward trend in daylight duration is part of a larger seasonal pattern that witnesses each month gaining more light as spring progresses. Following April, May continues this bright trajectory, offering 14 hours of daylight, which remains consistent through the summer months until August. The gradual rise in daylight not only heralds the arrival of warmer weather but also invigorates outdoor activities and social gatherings in the region, creating a vibrant atmosphere that is immensely appreciated by locals and visitors alike.
In April, the winds in Incheon, South Korea exhibit a gentle embrace with an average speed of 3.2 m/s (7 mph), slightly rising from the 2.9 m/s (7 mph) noted in March. This subtle uptick hints at the arrival of spring, as the winds start to bring a refreshing touch to the environment. Following the typically brisk winter months, where January and February boast average speeds of 3.4 m/s (8 mph) and 3.7 m/s (8 mph), April’s breezes create a delightful contrast, preparing the city for the warmer days ahead. As May approaches, the wind settles into a consistent rhythm at 3.3 m/s, maintaining the mildness that characterizes this blooming season. Overall, April serves as a transition, balancing the winter chill with the budding warmth of spring, setting the stage for a vibrant summer in Incheon.
Weather in Incheon varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Incheon, focusing on differences in temperature, rainfall, humidity, and UV levels.
April and January present contrasting weather patterns. April boasts milder temperatures, ranging from a minimum of 1°C (33°F) to a maximum of 25°C (78°F), with an average of 12°C (54°F). It is also characterized by higher precipitation levels, averaging 49 mm (1.9 in) over about 6 days, and higher humidity at 75%. In stark contrast, January is much colder, with temperatures dipping as low as -16°C (3°F) and averaging -2°C (29°F), and a maximum of 12°C (54°F). Precipitation in January is also significantly lower, at 17 mm (0.7 in) spread over just 2 days, with a humidity level of 71%. For more details on January weather, you can check Incheon weather in January.
April and February present quite distinct weather patterns. In April, temperatures range from a minimum of 1°C (33°F) to a maximum of 25°C (78°F), with an average of 12°C (54°F), while February is notably colder, featuring a minimum of -14°C (6°F) and an average temperature of 0°C (32°F). Precipitation also varies, with April experiencing 49 mm (1.9 in) over 6 days, compared to February's 21 mm (0.8 in) over just 4 days. Additionally, April's humidity is higher at 75%, contrasting with February's 65%. For more detailed insights about February weather, you can check Incheon weather in February.
April's weather is notably milder than March's, with average temperatures rising from March's 6°C (44°F) to a more pleasant 12°C (54°F). While March experiences colder minimum temperatures, dropping to -6°C (21°F), April offers a more comfortable range, starting at 1°C (33°F). Precipitation levels are similar between the two months, with April receiving 49 mm (1.9 in) over 6 days compared to March's 44 mm (1.7 in) over 5 days. Additionally, the humidity increases in April to 75%, compared to March's 65%, contributing to a transition toward spring weather. For more details, check out Incheon weather in March.
April weather offers a transitional atmosphere as the temperatures gradually rise, with minimums dipping to around 1°C (33°F) and maximums reaching 25°C (78°F). The month sees an average temperature of 12°C (54°F) alongside a moderate amount of rainfall totaling 49 mm (1.9 in) over about 6 days, with humidity levels around 75%.
In contrast, May brings warmer conditions, with minimum temperatures of 7°C (44°F) and average highs of 28°C (82°F). The average temperature climbs to 17°C (63°F), but it also experiences increased precipitation of 107 mm (4.2 in) over 8 days, and humidity rises slightly to 81%. For a detailed look at the weather during this month, you can check Incheon weather in May.
In April, temperatures average around 12°C (54°F), with a minimum of 1°C (33°F) and a maximum of 25°C (78°F), while June sees a significant rise in warmth with an average temperature of 22°C (71°F), ranging from a minimum of 14°C (57°F) to a maximum of 31°C (88°F). While April typically experiences 49 mm (1.9 in) of precipitation over about 6 days, June has higher precipitation levels at 77 mm (3.0 in) across approximately 9 days. Furthermore, humidity is slightly lower in April at 75%, compared to a higher 85% in June, making the latter month feel more humid and warmer. For more detailed information, you can check Incheon weather in June.
April and July present contrasting weather conditions. In April, temperatures range from a chilly minimum of 1°C (33°F) to a pleasant maximum of 25°C (78°F), with an average of 12°C (54°F). The month experiences moderate precipitation of 49 mm (1.9 in) over about 6 days, accompanied by a humidity level of 75%. In stark contrast, July sees significantly warmer temperatures, with a minimum of 19°C (66°F), an average of 26°C (78°F), and a maximum soaring to 35°C (95°F). This summer month also brings heavy rainfall, totaling 232 mm (9.1 in) across 14 days, along with higher humidity levels reaching 91%. For a closer look at July weather specifics, you can check Incheon weather in July.
April and August present distinctly different weather patterns. In April, temperatures are mild, ranging from a minimum of 1°C (33°F) to a maximum of 25°C (78°F), with an average of 12°C (54°F). Precipitation is relatively low, totaling 49 mm (1.9 in) over about 6 days, accompanied by a humidity level of 75%. In contrast, August is much warmer, featuring a temperature range of 17°C (63°F) to 36°C (97°F) with an average of 27°C (80°F). However, this month experiences significantly higher rainfall, with precipitation of 256 mm (10.1 in) occurring over approximately 15 days and humidity rising to 91%. For more details on August weather, you can check Incheon weather in August.
April and September present contrasting weather patterns. In April, temperatures range from a chilly minimum of 1°C (33°F) to a pleasant maximum of 25°C (78°F), with an average of 12°C (54°F). This month sees about 49 mm (1.9 in) of precipitation over roughly 6 days, accompanied by a humidity level of 75%. In contrast, September is noticeably warmer, with minimum temperatures around 11°C (53°F) and maximums reaching up to 31°C (87°F), averaging 22°C (72°F). The month is also wetter, accumulating 133 mm (5.2 in) of rainfall over 9 days and slightly higher humidity at 77%. For those interested in more details, check out Incheon weather in September.
In comparing the weather of April and October, both months exhibit a gradual transition in temperatures and conditions. April typically has a minimum temperature of 1°C (33°F) and an average of 12°C (54°F), while October features slightly warmer conditions with a minimum of 2°C (36°F) and an average of 15°C (60°F). The maximum temperatures also reflect this trend, with April reaching up to 25°C (78°F) compared to October's peak of 28°C (82°F). Precipitation levels are similar, with April receiving 49 mm (1.9 in) and October slightly higher at 59 mm (2.3 in), both experiencing rainfall on about 6 days. Humidity is marginally higher in October at 79% compared to April's 75%. For more details, you can check the weather specifics for this month at Incheon weather in October.
April and November present contrasting weather conditions despite both being transitional months. In April, temperatures range from a minimum of 1°C (33°F) to a pleasant maximum of 25°C (78°F), with an average of 12°C (54°F) and a moderate humidity level of 75%. The month sees about 49 mm of precipitation over six days. In contrast, November experiences more chill, with temperatures dipping to a minimum of -5°C (23°F) and averaging around 8°C (47°F), peaking at 21°C (69°F). This month has slightly higher precipitation at 53 mm over five days, accompanied by a higher humidity level of 80%. For those interested in more details, you can check out Incheon weather in November.
April and December present strikingly different weather conditions. In April, temperatures range from a chilly 1°C (33°F) at night to a comfortable 25°C (78°F) during the day, with an average temperature of 12°C (54°F). This month experiences more precipitation, totaling 49 mm (1.9 in) over about 6 days, along with a humidity level of 75%. In contrast, December is much colder, with temperatures dropping to a minimum of -14°C (7°F) and an average of 0°C (33°F), peaking at 12°C (54°F). The month sees less precipitation, totaling 24 mm (0.9 in) over 5 days, while humidity remains slightly lower at 74%. For more details on December weather specifically, visit Incheon weather in December.
April in Incheon ushers in a refreshing transition to spring, marked by a notable warmth that's absent in the chillier months. With average temperatures climbing, residents and visitors can enjoy milder conditions and more comfortable outdoor activities. Although April does see some rainfall, it's relatively light compared to the heavier downpours of the summer months, making it an ideal time for blooming flowers and vibrant landscapes. Humidity remains moderate, contributing to that delightful spring atmosphere. For a comprehensive understanding of how April weather fits into Incheon's yearly climate profile, check out Incheon Climate.