Last updated: October 30, 2025
In May, Incheon, South Korea experiences a delightful transition into warmer weather, with maximum temperatures reaching up to 28°C (82°F) and an average around 17°C (63°F). While the minimum temperatures can drop to 7°C (44°F), the warmth of late spring is palpable. Expect moderate rainfall, with a total of 107 mm (4.2 in) spread over approximately 8 days, contributing to the region's lush greenery. The humidity level hovers around 81%, adding a tropical feel to the atmosphere. May in Incheon beautifully balances pleasant temperatures and vibrant blossoms, making it an ideal time for outdoor activities and exploration.
As spring unfolds in Incheon, South Korea, May emerges as a delightful harbinger of warmer days, boasting a minimum temperature of 7°C (44°F) and a pleasant average of 17°C (63°F), peaking at 28°C (82°F). This month showcases a noteworthy transition from the crisp air of earlier spring months, making it ideal for outdoor activities and exploring the blooming landscapes. With temperatures consistently on the rise from the colder months of January through April, May offers a significant leap into the comfort of early summer, encouraging both locals and visitors to bask in the vibrant atmosphere and warm sunshine that the season brings. As the days grow longer and warmer, the burgeoning energy of spring truly comes alive in Incheon during this vibrant month.
May in Incheon, South Korea, experiences a significant uptick in precipitation, with rainfall averaging 107 mm (4.2 in) over 8 rainy days. This marks a sharp increase from the preceding months, highlighting a transition into the wetter season. Compared to January's modest 17 mm and April's 49 mm, May's rainfall signals the onset of more substantial spring showers. Notably, this trend continues into the early summer months, with June and July seeing even higher precipitation levels, particularly in July when 232 mm (9.1 in) falls over 14 days. The May weather, therefore, not only establishes a pattern of increasing rainfall but also sets the stage for the intense monsoon period that follows, making it a pivotal month in Incheon’s climatic calendar.
In May, Incheon experiences a notable uptick in humidity, reaching 81%, which marks a significant rise from the previous months. This increase sets the stage for the sweltering summer ahead, as June and July see humidity levels soar to 85% and 91%, respectively. The transition from April's 75% to May's humidity illustrates a clear upward trend, preparing residents and visitors alike for the increasingly sticky conditions typical of the summer months in South Korea. As the year progresses, the pattern of elevated humidity continues, with August maintaining that uncomfortable 91%, before gradually tapering off in the fall.
In May, Incheon experiences a sharp increase in UV exposure, with the UV Index reaching 9, classifying it under the very high exposure category. This trend marks a noticeable uptick from April’s Index of 8, highlighting the need for sun protection as the burn time shortens to just 15 minutes. As spring progresses, the potential for skin damage rises significantly, continuing into June, where the UV Index peaks at 10. This indicates a pattern of intensifying sunlight, reminding residents and visitors alike to stay vigilant and protect their skin from harmful UV rays. For more details on the UV Index throughout the year, check out Incheon UV Index.
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May in Incheon, South Korea, boasts a delightful 311 hours of sunshine, marking it as a significant peak in the city's solar calendar. The month showcases a consistent upward trend, following the gradual increase from 199 hours in January to 287 hours in April. As spring transitions into summer, the sun shines even brighter in June, reaching an impressive 317 hours. This sunny pattern not only enhances outdoor activities but also embodies the vibrant spirit of the city, inviting both locals and visitors to bask in the warmth and beauty of May's longer days. As the summer approaches, the sunlight remains generous, illuminating the bustling streets and tranquil parks of Incheon.
In Incheon, South Korea, the likelihood of sunny weather in May hovers around 39%, marking it as one of the months with reduced sunshine compared to others in the spring season. January and February boast higher chances at 52% and 55%, while March and April slightly decrease to 44% and 45% respectively. This trend suggests a gradual decline in sunny days leading into the warmer months of summer. Interestingly, from May onward, the chances of sun remain stagnant at 39% for both June and July, indicating a consistent, albeit low, likelihood of clear skies during early summer. As the year transitions to fall, sunny days start to rebound, with November and December showing an encouraging increase, reaching 61% and 63% respectively.
In Incheon, South Korea, the daylight duration experiences a notable transformation throughout the year, reflecting the changing seasons. As winter fades, January starts with a modest 9 hours of daylight, gradually increasing as spring approaches. By March, daylight extends to 11 hours, and a vibrant April ushers in 13 hours of sun, setting the stage for the peak of spring. In May, the days reach 14 hours of bright sunlight, continuing through June and July, presenting an optimal opportunity for outdoor activities and exploration. As summer gives way to fall, daylight starts to taper, dropping to 13 hours in August and further down to 12 hours in September. The trend continues as autumn unfolds, with daylight reducing to 11 hours in October, and finally returning to 10 hours in November and 9 hours in December, marking a full circle to the serene calm of winter. This rhythmic dance of daylight not only enhances the beauty of each season but also deeply influences the daily life and culture of the region.
In Incheon, South Korea, May greets residents with a gentle breeze, as the average wind speed hovers at 3.3 m/s (7 mph). This month continues a slight upward trend since the calmer months of winter, where January and February saw averages of 3.4 m/s and 3.7 m/s respectively. As spring unfolds, wind speeds remain relatively stable, reflecting a moderate environment conducive to outdoor activities. Interestingly, as the summer months approach—specifically June and July—winds begin to taper off, reaching a low of 2.3 m/s (5 mph) in July. This seasonal shift illustrates the dynamic nature of Incheon’s climate, where the arrival of warmer weather typically means a shift towards less breezy conditions. May, therefore, stands as a delightful balance, offering just enough wind to enliven the air while still embracing the warmth of impending summer.
Weather in Incheon varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Incheon, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January present stark contrasts in weather conditions. In May, temperatures range from a chilly 7°C (44°F) at night to a warm 28°C (82°F) during the day, with an average of 17°C (63°F). This month also sees considerable precipitation, totaling 107 mm (4.2 in) over about 8 days, and a high humidity level of 81%. In contrast, January experiences much colder weather, with temperatures dropping as low as -16°C (3°F) and averaging around -2°C (29°F), peaking at 12°C (54°F). This winter month has significantly less rainfall, accumulating only 17 mm (0.7 in) over 2 days and a lower humidity of 71%. For more details on January weather, check out Incheon weather in January.
May and February showcase contrasting weather conditions. In May, temperatures range from a chilly 7°C (44°F) at night to a warm 28°C (82°F) during the day, with an average of 17°C (63°F). This month is characterized by higher humidity at 81% and considerable rainfall, totaling 107 mm (4.2 in) over about 8 days. In stark contrast, February experiences much colder temperatures, with a minimum of -14°C (6°F) and a maximum of 15°C (59°F), averaging 0°C (32°F). The precipitation is significantly lower at 21 mm (0.8 in) over just 4 days, and humidity stands at a cool 65%. For more detailed information, refer to Incheon weather in February.
When comparing the weather in May and March, it is clear that May offers a significantly warmer climate. The average temperature in May reaches 17°C (63°F), with highs of up to 28°C (82°F), while March is much cooler, with an average of only 6°C (44°F) and a maximum of 19°C (66°F). Additionally, May experiences higher humidity at 81% compared to March's 65%, contributing to a more humid feel. Precipitation levels also increase in May, with 107 mm (4.2 in) over 8 days, compared to March's 44 mm (1.7 in) over 5 days. For more details on March weather, you can check Incheon weather in March.
In comparing the weather of April and May, we see a noticeable transition into warmer conditions. May features a minimum temperature of 7°C (44°F) and an average of 17°C (63°F), which is significantly warmer than April's minimum of 1°C (33°F) and average of 12°C (54°F). While both months experience precipitation, May has a greater amount with 107 mm (4.2 in) over 8 days, compared to April's 49 mm (1.9 in) over just 6 days. Humidity levels also rise in May to 81%, up from April's 75%. For more detailed information, you can check out Incheon weather in April.
May and June exhibit a notable transition in weather patterns. In May, temperatures range from a minimum of 7°C (44°F) to a maximum of 28°C (82°F), averaging around 17°C (63°F). The month experiences considerable rainfall, totaling 107 mm (4.2 in) over approximately 8 days, while humidity levels sit at 81%. In contrast, June brings warmer temperatures, with a minimum of 14°C (57°F) and a maximum of 31°C (88°F), resulting in an average of 22°C (71°F). Although June sees slightly less precipitation at 77 mm (3.0 in) over 9 days, humidity rises to 85%. For a more detailed overview of the weather in June, you can check Incheon weather in June.
May and July present contrasting weather profiles as summer progresses. In May, temperatures range from a minimum of 7°C (44°F) to a maximum of 28°C (82°F), with an average temperature of 17°C (63°F). The month sees about 107 mm (4.2 in) of precipitation over 8 days, accompanied by a relative humidity of 81%. In contrast, July experiences much warmer conditions, with minimum temperatures around 19°C (66°F) and maximums soaring to 35°C (95°F). The average temperature rises to 26°C (78°F), while precipitation increases significantly to 232 mm (9.1 in) over 14 days, coupled with higher humidity at 91%. For more specifics on July's climate, check out Incheon weather in July.
May and August present contrasting weather patterns. In May, temperatures range from a cool minimum of 7°C (44°F) to a pleasant average of 17°C (63°F), peaking at 28°C (82°F). The month experiences moderate rainfall, with a total of 107 mm (4.2 in) spread over 8 days, accompanied by a humidity level of 81%. In stark contrast, August brings much warmer conditions, with minimum temperatures starting at 17°C (63°F) and averaging 27°C (80°F), while daytime highs can reach a scorching 36°C (97°F). This month is also marked by significantly higher precipitation, totaling 256 mm (10.1 in) over 15 days and a humidity level of 91%. For more details on what to expect during this summer month, check out Incheon weather in August.
May typically ushers in a refreshing weather transition, with temperatures ranging from a cool 7°C (44°F) to a comfortable high of 28°C (82°F). Despite its pleasant warmth, the month experiences significant rainfall, averaging 107 mm (4.2 in) over 8 days and humidity levels around 81%. In contrast, September showcases a gradual warming trend, featuring higher average temperatures of 22°C (72°F) and maximums reaching 31°C (87°F). However, this month also brings increased precipitation, totaling 133 mm (5.2 in) over 9 days, although the humidity is slightly lower at 77%. For a detailed overview of September weather, check this link: Incheon weather in September.
May and October present contrasting weather patterns. In May, temperatures range from a minimum of 7°C (44°F) to a comfortable maximum of 28°C (82°F), with an average of 17°C (63°F). The month sees 107 mm (4.2 in) of precipitation over about 8 days, contributing to a relatively high humidity of 81%. In contrast, October experiences cooler temperatures, with a minimum of 2°C (36°F) and an average of 15°C (60°F), while still reaching a maximum of 28°C (82°F). Precipitation is notably less, totaling 59 mm (2.3 in) over 6 days, and humidity slightly decreases to 79%. For more details on October weather, check this link: Incheon weather in October.
May and November present contrasting weather patterns, highlighting the transition from spring to late autumn. In May, temperatures range significantly, with a minimum of 7°C (44°F) and a maximum reaching 28°C (82°F), averaging around 17°C (63°F). This month experiences relatively high humidity at 81% and receives 107 mm (4.2 in) of precipitation over about 8 days, making it lush and vibrant. In contrast, November sees colder temperatures, with a minimum of -5°C (23°F) and a maximum of 21°C (69°F), averaging only 8°C (47°F). The precipitation decreases to 53 mm (2.1 in) over roughly 5 days, and humidity remains slightly lower at 80%. For a closer look at November weather specifics, you can visit Incheon weather in November.
In May, the weather is pleasantly warm, with average temperatures around 17°C (63°F) and highs reaching up to 28°C (82°F), creating an inviting environment for outdoor activities. This month sees an average of 107 mm (4.2 in) of precipitation over 8 days, accompanied by high humidity at 81%, adding a touch of tropical feel to the atmosphere. In contrast, December brings a stark chill, with average temperatures dropping to around 0°C (33°F) and lows plummeting to -14°C (7°F). The month experiences significantly less precipitation at only 24 mm (0.9 in) over 5 days, and the humidity decreases to 74%, emphasizing the cold and crisp weather typical of winter. For more details on December weather, you can visit Incheon weather in December.
As spring reaches its peak in Incheon, May offers a delightful mix of warmth and vibrancy, standing out from the cooler months that precede it. With maximum temperatures making a noticeable climb and an average that encourages outdoor activities, residents and visitors alike can revel in the pleasant conditions. However, it’s essential to be prepared for occasional rain, as May brings a bit more precipitation than earlier months, contributing to the lush scenery. The high humidity levels amplify the warmth, creating a unique atmosphere that distinguishes May from the milder spring days. For a deeper dive into the year's weather patterns, visit Incheon Climate.