Last updated: October 30, 2025
In Yongsan, South Korea, May brings a delightful blend of warmth and occasional rain, making it a vibrant month for residents and visitors alike. Temperatures soar to a maximum of 31°C (89°F) during the day, while evenings cool down to a pleasant 18°C (65°F), providing a refreshing respite. However, the month also features a low of 4°C (40°F), offering a stark contrast that hints at the transition from spring to summer. With an average humidity of 79% and 82 mm (3.2 in) of rainfall spread over 8 days, occasional showers contribute to the lush scenery, ideal for outdoor activities. Whether you’re exploring vibrant local culture or enjoying the natural beauty, May in Yongsan promises a dynamic experience.
May in Yongsan, South Korea, heralds the arrival of warmer days, with temperatures marking a noticeable shift from the chill of winter. Nighttime lows around 4°C (40°F) signal the retreat of cold, while the average climbs to a comfortable 18°C (65°F), inviting residents to embrace the outdoors. The month can see peaks soaring to 31°C (89°F), making it a perfect time for picnics and outdoor festivals. This transition period not only showcases a significant rise in temperature compared to the preceding months but also sets the stage for the sultry summer that follows. As nature bursts into bloom, May offers a delightful blend of warmth and freshness, providing a vibrant backdrop for the blossoming city.
In May, Yongsan, South Korea experiences a notable uptick in precipitation, with 82 mm (3.2 in) of rainfall recorded over 8 days. This marks an increase from April’s 69 mm and signifies the onset of the region's wetter season, setting the stage for the heavy rains that characterize the summer months. This gradual rise in rainfall is evident as the spring months progress, reflecting a shift from the relatively dry early months of the year. As temperatures begin to climb, this May rainfall not only nourishes the blossoming flora but also foreshadows the even heavier precipitation that residents can expect in June and July.
As spring transitions into summer, May in Yongsan, South Korea, marks a significant rise in humidity, reaching 79%—the second highest level of the year so far. This increase follows April's wetter embrace at 74%, setting the stage for the peak humidity months ahead. The trend is clear: as temperatures climb in June and July, humidity continues to soar, with July and August hitting a sweltering 91%. Such high moisture levels not only contribute to the sultry summer atmosphere but also enhance the vibrancy of the lush landscapes, making May a captivating prelude to the warmest days of the year.
In May, Yongsan experiences a UV Index of 9, maintaining a very high exposure category similar to April, which indicates that sun protection is essential. With a burn time of just 15 minutes, the risk of overexposure is significant, urging residents and visitors to be proactive about their skin safety when enjoying outdoor activities. As the temperatures rise heading into summer, the UV Index will continue to reach extreme levels in June and July, emphasizing the importance of being mindful of sun exposure. For more details on the UV Index throughout the year, check out Yongsan UV Index.
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As spring transitions into summer, **May in Yongsan, South Korea, shines brightly with an impressive 303 hours of sunlight, marking it as one of the sunniest months of the year. This burst of daylight follows a steady ascent from January's 194 hours to February's 236 hours and March's 276 hours. The gradual increase in sunshine is palpable, peaking in May before dipping slightly in June to 301 hours. The trend showcases a clear seasonal pattern, with sunlight waning in the hotter months of July and August, where hours drop to 265 and 273, respectively. As the year progresses, daylight hours gently decrease again in the fall, but May's brilliance truly exemplifies the vibrant energy of the season.
In May, the likelihood of sunny weather in Yongsan, South Korea dips to 36%, marking a subtle decrease from the preceding months. This trend indicates that as spring transitions into summer, the frequency of sunny days can be less predictable. Notably, the weather begins to shift with the approach of summer, following April's promising 42% chance. As the rainy season looms closer, the sunshine seems to retreat, with subsequent months like June and July showing even lower probabilities. Overall, while May might not boast the sunniest days, it still offers glimpses of brightness amidst the evolving climate.
As spring unfolds in Yongsan, South Korea, daylight hours gradually increase, reaching 14 hours in both May and June. This surge from 11 hours in March to 14 hours in May reflects the enchanting transition into summer, inviting longer days and more outdoor activities. After June, daylight begins to decline slightly, leading into the autumn months where daylight sustains itself at 13 hours in August before tapering off to 12 hours in September. The cyclical nature of daylight duration in Yongsan offers a vibrant rhythm to the seasons, with each month bringing its unique blend of light and warmth.
In May, Yongsan experiences a gentle caress of wind, with an average speed of 2.8 m/s (6 mph). This month sees a slight dip in wind intensity compared to the previous month, yet it remains relatively calm, similar to early spring months. As spring transitions into summer, the wind tends to soften, a trend that continues into June when speeds decrease further. Interestingly, while February marked the highest average wind speed of the year at 3.4 m/s (8 mph), conditions in May offer a serene backdrop, perfect for outdoor activities. This calmness is punctuated by an overall trend of decreasing wind speeds as the summer approaches, culminating in the lowest averages during the peak of the season in July and August.
Weather in Yongsan varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Yongsan, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January present two distinctly different weather profiles. In May, temperatures can range from a chilly 4°C (40°F) at night to a warm 31°C (89°F) during the day, with an average of 18°C (65°F). This month also experiences relatively high humidity at 79% and receives about 82 mm (3.2 inches) of precipitation over approximately 8 days. In stark contrast, January is characterized by much colder conditions, with temperatures dipping as low as -20°C (-4°F) and averaging around -1°C (30°F), peaking at a milder 13°C (55°F). Precipitation is minimal in January, totaling just 25 mm (1.0 inch) over 4 days, and the humidity is slightly lower at 71%. For a more detailed look at January weather, you can check Yongsan weather in January.
May presents a much warmer climate compared to February, with temperatures ranging from a minimum of 4°C (40°F) to a maximum of 31°C (89°F), leading to an average of 18°C (65°F). The month also experiences higher humidity at 79% and increased precipitation with 82 mm (3.2 in) spread over eight days. In contrast, February features a much colder environment, marked by a minimum temperature of -15°C (5°F) and an average of just 1°C (34°F), peaking at 22°C (71°F). This month has significantly less precipitation at 34 mm (1.3 in) over four days and a lower humidity level of 66%. For a deeper look at February's weather, you can check Yongsan weather in February.
In comparing the weather between May and March, there is a notable difference in temperatures and humidity levels. May sees a minimum temperature of 4°C (40°F) and can rise to a maximum of 31°C (89°F), averaging around 18°C (65°F), making it significantly warmer than March, which has a minimum of -5°C (23°F) and a maximum of 24°C (75°F) with an average of 8°C (46°F). Additionally, May experiences higher humidity at 79% compared to March's 64%, contributing to a more humid feel during late spring. Precipitation is slightly greater in May, with 82 mm (3.2 in) over 8 days, while March records 65 mm (2.5 in) over the same number of days. For more details on the March weather, you can check Yongsan weather in March.
In comparison to April, May experiences a notable increase in average temperatures, with minimums of 4°C (40°F) and maximums reaching up to 31°C (89°F), compared to April's minimum of -1°C (30°F) and maximum of 29°C (85°F). Additionally, May sees a higher average humidity of 79% versus April's 74%, creating a more muggy atmosphere as the month progresses. Precipitation is also slightly higher in May at 82 mm (3.2 in) over 8 days, compared to April, which recorded 69 mm (2.7 in) across 6 days. For more detailed information on April weather, visit Yongsan weather in April.
May and June exhibit distinct differences in weather patterns. In May, temperatures range from a chilly minimum of 4°C (40°F) to a warm maximum of 31°C (89°F), with an average of 18°C (65°F). The month sees about 82 mm (3.2 in) of precipitation over 8 days, accompanied by a humidity level of 79%. In contrast, June boasts higher temperatures with a minimum of 11°C (52°F) and a maximum of 34°C (94°F), averaging at 22°C (73°F). Rainfall increases slightly to 102 mm (4.0 in) over the same number of days, while humidity rises marginally to 82%. For a more detailed look at the weather specifics in June, you can check Yongsan weather in June.
When comparing the weather in May and July, it’s clear that July tends to be much warmer and more humid. In May, temperatures range from a cooler 4°C (40°F) at night to an average of 18°C (65°F) and peaking at 31°C (89°F). The month experiences moderate precipitation, with around 82 mm (3.2 in) falling over 8 days, accompanied by a humidity level of 79%. In contrast, July showcases significantly higher temperatures, with nighttime lows of 17°C (62°F), averages around 25°C (78°F), and highs reaching 36°C (98°F). The month is notably wetter, receiving 222 mm (8.8 in) of rain over 16 days and an increase in humidity to 91%, making it a much more oppressive month overall. For a detailed look at July conditions, you can check Yongsan weather in July.
Comparing the weather in May and August reveals notable differences in temperature, humidity, and precipitation patterns. May experiences a milder climate, with temperatures ranging from a minimum of 4°C (40°F) to a maximum of 31°C (89°F), averaging around 18°C (65°F). It also has a relatively low precipitation level of 82 mm (3.2 in) over 8 days and a humidity of 79%. In contrast, August is significantly warmer, with temperatures starting at a minimum of 16°C (60°F) and peaking at 38°C (100°F), averaging 26°C (79°F). The month is also much wetter, receiving 229 mm (9.0 in) of rainfall over 16 days, and has a higher humidity at 91%. For a more detailed overview of the weather conditions during this month, check out Yongsan weather in August.
In comparing the weather between May and September, notable differences emerge. May tends to have a wider temperature range, with minimums dipping to 4°C (40°F) and maximums reaching 31°C (89°F), while September shows a milder range, with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 30°C (87°F). Additionally, September experiences higher precipitation, totaling 182 mm (7.2 in) over 10 days, compared to May's 82 mm (3.2 in) over just 8 days. Humidity levels are relatively similar, with May at 79% and September slightly lower at 77%. For a detailed look at weather specifics, check the Yongsan weather in September.
May and October present contrasting weather experiences. In May, temperatures range from a minimum of 4°C (40°F) to a pleasant average of 18°C (65°F), peaking at a high of 31°C (89°F). The month sees a fair bit of rain, with 82 mm (3.2 in) of precipitation over about 8 days, contributing to a high humidity level of 79%. In contrast, October brings cooler temperatures, with a minimum of 0°C (32°F) and an average of 14°C (58°F), again peaking at a similar maximum of 31°C (88°F). This month typically has less rainfall, totaling 73 mm (2.9 in) over approximately 6 days, and maintains a slightly lower humidity level of 78%. For more details on weather conditions during this time, check out Yongsan weather in October.
May and November present contrasting weather patterns. In May, temperatures range from a minimum of 4°C (40°F) to a maximum of 31°C (89°F), with an average of 18°C (65°F). The month experiences relatively higher precipitation, totaling 82 mm (3.2 in) over about 8 days, and humidity levels hover around 79%. In contrast, November sees much cooler temperatures, with a minimum of -5°C (23°F), an average of 8°C (46°F), and a maximum of 21°C (70°F). Precipitation is considerably lower at 31 mm (1.2 in) over just 5 days, and the humidity remains similar at 80%. For more insights into November weather, check out Yongsan weather in November.
May and December present contrasting weather conditions. In May, temperatures swing from a chilly 4°C (40°F) at night to a warm average of 18°C (65°F), peaking at a maximum of 31°C (89°F). This month also experiences higher precipitation, with 82 mm (3.2 in) falling over about 8 days, coupled with a relatively high humidity of 79%. In stark contrast, December is significantly colder, with temperatures ranging from a minimum of -13°C (8°F) to an average of just 1°C (33°F) and a highest temperature of 15°C (59°F). Precipitation drops to 24 mm (1.0 in) across only 3 days, and humidity is slightly lower at 76%. For more details, you can check out Yongsan weather in December.
As May unfolds in Yongsan, the weather begins to shift dramatically from the cooler months, bringing a delightful warmth with average temperatures reaching 18°C (65°F) and peaks soaring to a maximum of 31°C (89°F). The increased warmth, however, comes hand-in-hand with higher humidity levels around 79%, making for a muggy atmosphere on some days. While rainfall remains moderate with about 82 mm spread across 8 days, the pleasant mix of sunny and refreshing days sets the stage for outdoor adventures. This transitional month hints at the vibrant summer ahead, making it the perfect time to explore the beauty of Yongsan. For more detailed insights into what to expect throughout the year, be sure to check out Yongsan Climate.