Last updated: October 30, 2025
In April, Seoul, South Korea experiences a delightful transition into spring, marked by a maximum temperature of 28°C (82°F) and an average temperature of 12°C (54°F). Early in the month, temperatures can dip to a chilly 0°C (32°F), reminding residents and visitors alike of winter's lingering touch. With an average of 55 mm (2.2 in) of precipitation over 6 days, the month brings refreshing showers that nurture the blossoming flora. The humidity levels hover around 75%, adding a touch of warmth and enhancing the vibrant atmosphere of this bustling city during one of its most picturesque seasons.
In April, Seoul, South Korea, begins to shake off the chill of winter, unveiling a fresh warmth as temperatures gradually rise. With a minimum of 0°C (32°F) and a comfortable average of 12°C (54°F), the city experiences a delightful transition into spring. Daily highs can reach up to 28°C (82°F), inviting residents and visitors alike to enjoy the blossoming cherry trees and vibrant outdoor activities. This month showcases a notable shift from the colder months, as April’s warmer climate foreshadows the upcoming summer heat, establishing a trend of increasing temperatures and longer days that characterize the city’s seasonal rhythm.
April in Seoul marks a significant transition in the city’s climate, as precipitation levels rise to 55 mm (2.2 in), reflecting the shift towards the wetter months ahead. This increase in rain, occurring over approximately 6 days, not only contributes to the blooming landscapes but also signals the end of the relatively dry early months of the year. Comparatively, March saw just 46 mm (1.8 in) of rainfall over 5 days, highlighting how April acts as a bridge between the dry spell of winter and the abundant rains of late spring and summer. As May approaches with a notable spike to 111 mm (4.4 in), it’s clear that April’s precipitation sets the stage for the more torrential downpours to follow, enhancing the lush vibrancy of Seoul's parks and gardens.
In April, Seoul experiences a notable rise in humidity, climbing to 75%, which marks an increase from the milder rates seen in the earlier months of the year. This uptick signals a transition into the warmer seasons, as the city braces for the more humid months ahead, with May and June peaking at 81% and 85%, respectively. April's humidity not only enhances the city's lush spring foliage but also prepares residents for the sultry summers characterized by 91% humidity in July and August. As temperatures begin to warm, this gradual increase in humidity sets the stage for Seoul’s vibrant, blooming landscape, inviting both locals and visitors to enjoy the city's beauty amidst the rising moisture.
In April, Seoul experiences a notable increase in ultraviolet (UV) radiation, with the UV Index reaching 8, categorizing it as very high. This shift marks a significant jump from the moderate levels seen in the earlier months, urging residents and visitors to be more mindful of sun exposure. With a burn time of just 15 minutes, it's crucial to take precautions such as wearing sunscreen, hats, and protective clothing. As warmer weather approaches, the trend continues with May and June seeing even higher indices, peaking at 9 and 10 respectively. This year-on-year pattern underscores the importance of staying informed about local UV levels and embracing sun safety. For more details on the current UV conditions, visit Seoul UV Index.
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As spring unfolds in Seoul, April shines brightly with 287 hours of sunshine, marking a delightful progression from the 282 hours enjoyed in March. This increase not only hints at the warmer weather ahead but also sets the stage for an enticing May, which boasts the highest monthly total at 311 hours. The upward trend in sunshine from the beginning of the year is evident, with hours gradually increasing from 199 in January to April's lush rays. The city basks in the gentle warmth of early spring, inviting locals and visitors alike to savor the blossoming beauty and vibrant atmosphere, while eagerly anticipating the sun-drenched days of summer.
As April unfolds in Seoul, South Korea, the likelihood of sunny weather hovers around 44%, showing a slight dip from the preceding months. This marks a gradual decline from the 55% chance of sunshine seen in both January and February, alongside a significant drop from March’s 43%. While April's sun is relatively likely compared to the cloudier weeks ahead in May and June, it is also a reminder of the transition into a more temperate season. With November and December showcasing the highest probabilities of sun at 58% and 64% respectively, it becomes clear that Seoul experiences its fair share of sunny spells as the year progresses, making April a tantalizing, if somewhat unpredictable, month for sunshine seekers.
As spring unfolds in Seoul, South Korea, April brings a delightful increase in daylight duration to 13 hours, a notable jump from March's 11 hours. This upward trend in daylight continues as the city moves into the warmer months, peaking at 14 hours in both May and June. From a winter low of 9 hours in January, the gradual lengthening of days not only brightens the atmosphere but also invites residents to indulge in outdoor activities and embrace the vibrant spring scenery. Following the summer solstice, daylight begins to taper off, illustrating a seasonal rhythm that sees Seoul basking in considerable light during the spring and summer months before gradually retreating into shorter days as autumn approaches.
As April unfolds in Seoul, South Korea, the average wind speed registers at 2.7 m/s (6 mph), slightly rising from March's gentle breezes. This moderate airflow creates a refreshing atmosphere that perfectly complements the city's vibrant spring blooms. In contrast to the chillier winter months, which experienced averages of 2.8 m/s in January and 3.1 m/s in February, April's winds are both welcoming and invigorating, setting the stage for outdoor activities. Notably, the winds begin to taper off as summer approaches, with June's average dipping to 2.0 m/s (4 mph). This seasonal transition not only enhances the pleasantness of the city but also marks the delicate balance between the crispness of early spring and the sultry warmth of approaching summer, allowing residents and visitors alike to savor the beauty of the season in comfort.
Weather in Seoul varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Seoul, focusing on differences in temperature, rainfall, humidity, and UV levels.
April and January showcase contrasting weather patterns. In January, the average temperature hovers around -2°C (28°F) with lows dipping to -18°C (1°F), making it the coldest month of the year; precipitation is low at 19 mm (0.8 in) over just 2 days. Comparatively, April experiences milder temperatures, ranging from a minimum of 0°C (32°F) to an average of 12°C (54°F) and a maximum of 28°C (82°F). April also sees more rainfall, totaling 55 mm (2.2 in) over 6 days, coupled with a higher humidity level of 75%. For more details on January weather, you can check Seoul weather in January.
When comparing the weather between April and February, it's evident that April experiences significantly milder temperatures. In April, the minimum temperature hovers around 0°C (32°F), while the average reaches 12°C (54°F) and can peak at a comfortable 28°C (82°F). In contrast, February is much colder, with temperatures dropping as low as -14°C (7°F) and only averaging around 0°C (32°F). Additionally, April sees more precipitation with 55 mm (2.2 in) spread over six days, compared to February's 22 mm (0.8 in) over just four days. The humidity is also higher in April at 75%, compared to February's 65%, making April feel noticeably warmer and more humid. For more detailed insights, you can visit Seoul weather in February.
April's weather is typically milder than March, with an average temperature rise from 7°C (44°F) in March to 12°C (54°F) in April. While both months experience similar levels of precipitation, April sees a slight increase to 55 mm (2.2 in) over 6 days compared to March's 46 mm (1.8 in) over 5 days. Additionally, April's higher humidity at 75% versus March's 65% contributes to a more humid and comfortable atmosphere as spring fully sets in. For a more detailed comparison, you can check out Seoul weather in March.
In April, the weather features a cooler temperature range, with a minimum of 0°C (32°F) and an average of 12°C (54°F), while May experiences milder conditions with a minimum of 6°C (43°F) and an average of 18°C (64°F). April also has a maximum temperature of 28°C (82°F), whereas May can reach up to 32°C (89°F), indicating a significant warm-up into late spring. However, May sees more precipitation, with 111 mm (4.4 in) falling over 9 days, compared to April's 55 mm (2.2 in) over 6 days, along with slightly higher humidity levels of 81%. For more detailed information, you can check Seoul weather in May.
In comparing the weather between April and June, we see a notable increase in temperature and humidity. April experiences a minimum temperature of 0°C (32°F) and an average of 12°C (54°F), while June sees a minimum of 12°C (54°F) and an average of 22°C (72°F). The maximum temperatures also rise significantly from 28°C (82°F) in April to 35°C (94°F) in June. Additionally, June has higher precipitation, with 86 mm (3.4 in) over 8 days compared to April's 55 mm (2.2 in) over 6 days. The humidity levels increase from 75% in April to 85% in June, contributing to a more sweltering atmosphere. For more detailed insights, check out this link: Seoul weather in June.
April and July present contrasting weather patterns, with April featuring cooler temperatures and lower humidity. In April, the temperatures range from a chilly 0°C (32°F) at night to a pleasant 28°C (82°F) during the day, accompanied by an average of 12°C (54°F). Precipitation is relatively moderate, averaging around 55 mm (2.2 in) over about 6 days, with humidity levels sitting at 75%.
In stark contrast, July is characterized by much warmer weather, with minimum temperatures starting at 18°C (64°F) and peaking at a scorching 36°C (97°F), averaging 26°C (79°F). Rainfall is significantly higher in July, with a total of 252 mm (9.9 in) over approximately 15 days, and the humidity rises to a steamy 91%. This shift not only highlights the transition from spring to summer but also underscores the more humid and variable conditions typical of July. For more detailed insights, check out Seoul weather in July.
April and August exhibit strikingly different weather patterns. In April, temperatures range from a chilly 0°C (32°F) at night to a pleasant 28°C (82°F) during the day, with an average of 12°C (54°F). The month sees moderate rainfall, with about 55 mm (2.2 in) spread over six days and a humidity level of 75%. In contrast, August is much warmer and more humid, with nighttime lows of 16°C (61°F) and daytime highs reaching a scorching 38°C (101°F), averaging around 26°C (80°F). The month is also wetter, with a significant 269 mm (10.6 in) of precipitation over 16 days and humidity soaring to 91%. For more information on August weather specifics, check out Seoul weather in August.
In April, the weather begins to warm up with temperatures ranging from a chilly 0°C (32°F) to a comfortable 28°C (82°F) and an average of 12°C (54°F). Rainfall is relatively low, totaling 55 mm (2.2 in) over about 6 days, and humidity hovers around 75%.
In contrast, September experiences warmer temperatures, with a minimum of 10°C (50°F) and a maximum of 31°C (88°F), averaging 21°C (70°F). However, it also sees increased precipitation, accumulating 133 mm (5.2 in) over approximately 9 days, while humidity rises slightly to 77%.
For a closer look at this season, you can visit Seoul weather in September.
April and October in Seoul both display a range of mild to warm temperatures, but there are some notable differences. In April, temperatures can vary from a chilly 0°C (32°F) to a pleasant maximum of 28°C (82°F), with an average temperature of 12°C (54°F). The month sees about 55 mm (2.2 in) of precipitation over six days, accompanied by a humidity level of 75%. Conversely, October experiences slightly warmer conditions, with daily temperatures ranging from 0°C (32°F) to a similar high of 28°C (83°F) and an average temperature of 14°C (58°F). Precipitation rises a bit to 63 mm (2.5 in) over the same number of rainy days, with humidity increasing to 79%. For more information about October weather, you can check Seoul weather in October.
April and November present contrasting yet intriguing weather patterns. In April, temperatures range from a chilly 0°C (32°F) at night to a warm 28°C (82°F) during the day, averaging around 12°C (54°F). The month experiences about 55 mm (2.2 in) of precipitation over roughly 6 days, accompanied by a humidity level of 75%. In contrast, November brings cooler conditions, with nighttime lows plummeting to -7°C (21°F) and daytime highs reaching 21°C (70°F), leading to an average temperature of 7°C (45°F). Precipitation is slightly lower at 54 mm (2.1 in), spread over 5 days, and humidity increases to 80%. For more detailed information, you can check Seoul weather in November.
April and December present a stark contrast in weather conditions. In April, temperatures range from a chilly 0°C (32°F) to a comfortable 28°C (82°F), with an average of 12°C (54°F). The month experiences moderate precipitation with about 55 mm (2.2 in) across roughly six days and maintains a humidity level of 75%. In contrast, December brings much colder weather, with temperatures dipping as low as -15°C (5°F) and averaging around -1°C (31°F). The maximum temperature only reaches 12°C (54°F), and the precipitation decreases significantly to 22 mm (0.9 in) over just four days, accompanied by slightly lower humidity at 74%. For more details on December weather, visit Seoul weather in December.
April in Seoul is a transitional month that ushers in milder temperatures and a budding vibrancy compared to the chill of winter. As the city awakens from its cold slumber, daytime highs can reach up to 28°C, making outdoor exploration delightful. However, the evenings remind us that winter isn't quite over yet, with temperatures occasionally dipping to around 0°C. This month also witnesses a moderate amount of precipitation, with six days of rain adding a refreshing touch to the spring air, which sits at a comfortable humidity level of 75%. For those looking to understand more about the shifting seasons in this dynamic city, check out Seoul Climate.