Last updated: October 30, 2025
May in Jeju City, South Korea presents a delightful yet dynamic weather profile, with temperatures ranging from a pleasant 10°C (51°F) to a maximum of 24°C (75°F), resulting in an average of 17°C (63°F). Visitors can expect a refreshing blend of sunshine and occasional rain, as 92 mm (3.6 in) of precipitation falls over approximately 9 days, contributing to the island's lush landscapes. The month is characterized by high humidity levels at 89%, enhancing the vibrant atmosphere ideal for outdoor adventures and exploration. Whether you're wandering through blooming gardens or savoring local cuisine, May's mild climate makes for an unforgettable experience in this picturesque destination.
In May, Jeju City experiences a delightful transition into spring, with temperatures beginning to warm significantly. The minimum temperature rises to a comfortable 10°C (51°F), while the average climbs to a pleasant 17°C (63°F), peaking at a delightful 24°C (75°F). This month's weather marks a clear departure from the cooler April days, showcasing an inviting atmosphere perfect for outdoor activities and exploration. The steady increase in warmth signals the island's approach to summer, making May an ideal time to appreciate Jeju's blooming landscapes and vibrant culture. As the temperatures continue to rise in the following months, May serves as a beautiful bridge between the crispness of spring and the imminent heat of summer.
May in Jeju City experiences a notable shift in precipitation as it transitions into the warmer months. With 92 mm (3.6 in) of rain over approximately 9 days, the month reflects a substantial increase from the prior months. This is indicative of the island's impending summer season, where rainfall tends to intensify. May’s precipitation is relatively consistent with April, yet it marks the beginning of a string of wetter months leading into June, which sees a dramatic rise in rainfall to 141 mm (5.6 in). This trend not only highlights May's role as a crucial precursor to Jeju's rainy season but also underscores the island's captivating blend of vivid spring blooms and the fresh, earthy scents that follow the showers. Visitors can enjoy the lush landscape that springs to life amidst this moderate rainfall, making May an enchanting time to experience Jeju.
As spring transitions into summer, May in Jeju City witnesses a significant rise in humidity, reaching 89%—one of the highest levels of the year. This trend reflects a gradual increase from the cooler months, where humidity hovered around 72-83%, culminating in the balmy, tropical conditions of late spring. Following May, the humidity continues to soar, peaking in the summer months of June and July, where it reaches an impressive 93% and 98%, respectively. Therefore, those visiting Jeju during May should be prepared for lush, verdant landscapes, as the high humidity nourishes the island's stunning flora, setting the stage for the vibrant summer ahead.
In May, Jeju City experiences a significant uptick in UV intensity, with the UV Index reaching 10, indicating a very high exposure category. This marks a continuation of the escalating trend from April’s 9. With a burn time of just 15 minutes, it’s crucial for residents and visitors alike to take proper precautions under the sun. As we transition into summer, this month sets the stage for even more extreme UV levels, peaking in June and July. This pattern highlights the importance of monitoring UV forecasts as outdoor activities increase, ensuring skin protection to enjoy the beautiful landscapes Jeju has to offer. For more detailed insights, visit the Jeju City UV Index.
UV Risk Categories
May in Jeju City, South Korea, shines as a beacon of sunlight with an impressive 304 hours of sunshine, marking it as one of the sunniest months of the year. This delightful surge comes on the heels of a steady increase throughout the spring, as hours of sunshine jump from 166 hours in January to 292 hours in April. The pattern continues as summer approaches, with only a slight dip to 298 hours in both June and July. Interestingly, the sun-soaked days of May not only herald the arrival of warmer weather but also set the stage for the summer months, providing an enticing preview of Jeju's vibrant outdoor experiences. As the year progresses, sunshine levels show some fluctuation, but the allure of May remains undeniable, making it a coveted time for visitors and locals alike to revel in the island's natural beauty.
In May, Jeju City experiences a 37% chance of sunny weather, a figure that reflects a slight dip from the increasing trend seen in April's 41%. While May tends to be sunnier than the winter months, it is not as bright as the upcoming autumn, where October boasts a 56% likelihood of sunshine. This pattern illustrates a gradual transition from the spring sunshine, peaking in the early summer months, before descending into the cloudier days of July. Visitors can expect a generally pleasant climate with a fair amount of sunshine, making May a charming time to explore the scenic beauty of Jeju.
In Jeju City, South Korea, the daylight duration gradually unfolds as the year progresses, with notable trends that highlight the island's luminous beauty. The year begins with a consistent 10 hours of daylight in both January and February, setting a tranquil pace for winter. As spring approaches in March, daylight begins to increase, reaching 11 hours and paving the way for the vibrant blooms of April, which enjoys 13 hours of sunlight. May continues this trend, maintaining the 13-hour mark, as the island fully embraces the warmth of spring. The days peak in June and July with 14 hours of brilliant daylight, creating the perfect backdrop for beach adventures and outdoor exploration. However, as summer transitions to autumn, daylight starts to wane, falling to 13 hours in August, then gradually decreasing to 12 hours in September and continuing down to 9 hours by December. This rhythmic fluctuation of daylight not only enhances the natural beauty of Jeju but also influences the seasonal activities and experiences for both residents and visitors alike.
In May, Jeju City experiences a gentle shift in its wind patterns, with an average wind speed of 4.1 m/s (9 mph). This marks a noticeable decrease from the stronger gusts seen in the earlier spring months of January through April, which hover around 6.5 m/s and 5.0 m/s respectively. As the island transitions into late spring and early summer, the winds become more relaxed, creating a tranquil atmosphere perfect for enjoying outdoor activities. Interestingly, this gentle breeze tends to pick up again slightly in July at 4.7 m/s but remains lower than the winter months. This trend highlights Jeju's seasonal variation, making May an ideal time for visitors seeking a tranquil escape amidst the island's natural beauty.
Weather in Jeju City varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Jeju City, focusing on differences in temperature, rainfall, humidity, and UV levels.
When comparing the weather in May to that of January, the differences are quite striking. May typically enjoys a milder climate with average temperatures ranging from a minimum of 10°C (51°F) to a maximum of 24°C (75°F), accompanied by high humidity at 89%. In contrast, January is much colder, featuring average temperatures that fluctuate between -2°C (29°F) and 19°C (66°F), with lower humidity levels at 72%. Additionally, May experiences more precipitation overall, with 92 mm (3.6 in) spread over 9 days, compared to January's 58 mm (2.3 in) across 10 days. For more detailed information, visit Jeju City weather in January.
May and February showcase a stark contrast in weather conditions. May boasts warmer temperatures, with a minimum of 10°C (51°F) and an average of 17°C (63°F), reaching a pleasant maximum of 24°C (75°F). In contrast, February has cooler readings, starting at a minimum of -1°C (31°F) and averaging just 7°C (44°F), with a maximum of 17°C (63°F). Additionally, May experiences higher humidity at 89% and greater precipitation, totaling 92 mm (3.6 in) over 9 days, while February has lower humidity at 70% and less rainfall at 59 mm (2.3 in) for the same number of rainy days. For more information, check out Jeju City weather in February.
In comparing the weather between March and May, May generally offers milder temperatures with a minimum of 10°C (51°F) and an average of 17°C (63°F), while March starts cooler with a minimum of 3°C (37°F) and an average of 10°C (51°F). The maximum temperatures in May can soar to 24°C (75°F), compared to March's peak of 18°C (65°F). Although May experiences slightly less precipitation at 92 mm (3.6 in) over 9 days, it has higher humidity levels at 89%, compared to the lower humidity of 73% in March. To learn more about the specific weather conditions in March, you can check Jeju City weather in March.
In comparing the weather between April and May, we observe a notable increase in temperatures. May experiences a minimum of 10°C, an average of 17°C, and a maximum of 24°C, whereas April's temperatures range from a minimum of 6°C to a maximum of 20°C. Despite similar levels of precipitation—with May seeing 92 mm over 9 days and April reporting 91 mm over 7 days—May tends to feel more humid, averaging 89% compared to April’s 83%. For more detailed information on April's weather, you can visit Jeju City weather in April.
May and June present a notable transition in weather patterns. In May, temperatures range from a minimum of 10°C (51°F) to a maximum of 24°C (75°F), with an average of 17°C (63°F). The month sees a considerable amount of rainfall, totaling 92 mm (3.6 in) over 9 days, and humidity levels are relatively high at 89%. In contrast, June experiences warmer conditions with minimum temperatures rising to 16°C (60°F) and maximums reaching 26°C (79°F), averaging 21°C (70°F). However, it also brings more precipitation, amounting to 141 mm (5.6 in) over 10 days, while humidity increases slightly to 93%. Overall, June is warmer and wetter compared to May. For more detailed information, you can visit Jeju City weather in June.
May and July display notable differences in weather patterns. In May, temperatures range from a minimum of 10°C (51°F) to a maximum of 24°C (75°F), with an average of 17°C (63°F). The month experiences around 92 mm (3.6 in) of precipitation over approximately 9 days, and humidity levels are relatively high at 89%. In contrast, July sees warmer temperatures, with minimums of 19°C (67°F) and maximums reaching 31°C (88°F), averaging 25°C (77°F). Precipitation significantly increases to 170 mm (6.7 in) over 14 days, accompanied by even higher humidity at 98%. For those interested in specific weather conditions, more details can be found at Jeju City weather in July.
In May, the weather is quite mild, with temperatures ranging from a minimum of 10°C (51°F) to a maximum of 24°C (75°F), and an average of 17°C (63°F). The humidity is relatively high at 89%, and the month experiences about 92 mm (3.6 in) of precipitation over approximately 9 days. In contrast, August brings significantly warmer conditions, with temperatures soaring between 22°C (72°F) and 31°C (88°F), averaging around 27°C (81°F). However, this month also sees increased rainfall, with 197 mm (7.7 in) of precipitation recorded over 15 days, and humidity levels rising to 96%. For more detailed information about August weather, you can visit Jeju City weather in August.
May and September exhibit distinct weather patterns, showcasing the transition from spring to early autumn. In May, temperatures range from a minimum of 10°C (51°F) to a maximum of 24°C (75°F), with an average of 17°C (63°F). This month sees about 92 mm (3.6 in) of precipitation over roughly 9 days and high humidity at 89%. In contrast, September experiences warmer conditions, with temperatures ranging from 18°C (65°F) to 28°C (83°F), averaging 23°C (74°F). However, it is also significantly wetter, receiving 298 mm (11.7 in) of rainfall over 15 days, and slightly lower humidity at 84%. For more information on September weather, visit Jeju City weather in September.
In comparing the weather between May and October, both months present a pleasant climate, but with some notable differences. May typically sees temperatures ranging from a minimum of 10°C (51°F) to a maximum of 24°C (75°F), with an average of 17°C (63°F) and higher humidity at 89%. However, October enjoys slightly warmer conditions, with temperatures ranging from 11°C (53°F) to 27°C (81°F) and an average of 19°C (66°F). Despite both months experiencing about nine days of rain, October receives a bit more precipitation at 109 mm (4.3 in) compared to May's 92 mm (3.6 in). For more detailed insights, you can check Jeju City weather in October.
May and November present contrasting weather patterns. In May, temperatures range from a minimum of 10°C (51°F) to a maximum of 24°C (75°F), with an average of 17°C (63°F). This month also experiences higher humidity at 89% and sees approximately 92 mm (3.6 inches) of rain over about 9 days, making it a lush and vibrant time of year. In contrast, November features a cooler range of temperatures, from a minimum of 6°C (43°F) to a maximum of 22°C (71°F), with an average of 14°C (57°F). Rainfall is significantly lower at 46 mm (1.8 inches) over 7 days, accompanied by lower humidity at 73%. For more detailed information, check out Jeju City weather in November.
In May, the weather is significantly warmer, with average temperatures ranging from 10°C (51°F) to a maximum of 24°C (75°F). The month experiences moderate rainfall, totaling 92 mm (3.6 in) over about 9 days, accompanied by high humidity at 89%. In contrast, December sees much cooler conditions, with average temperatures between 0°C (33°F) and 20°C (68°F). Rainfall is lighter, totaling 61 mm (2.4 in) over approximately 10 days, and the humidity drops to a more comfortable 71%. For a detailed look at December weather, you can visit Jeju City weather in December.
May in Jeju City unveils a delightful transition into spring, marked by milder temperatures and a palpable increase in humidity. With daytime highs reaching a comfortable 24°C, the month stands out as a perfect time for outdoor adventures. While the average temperature hovers around 17°C, nighttime can be brisk, dropping to cooler lows. Though May does see its share of rain, with 9 days of precipitation contributing to a total of 92 mm, these showers often provide a refreshing contrast to the sunny periods, making nature bloom vibrantly. This blend of warmth and occasional rain sets May apart from the cooler months of spring and the hotter days of summer. For further insight into the ongoing shifts in weather patterns and their impact on your visit, check out Jeju City Climate.