Seoul Weather in May
May in Seoul brings high temperatures, with daytime highs of 24°C (75°F) and nights around 12°C (54°F). Quite a bit of rainfall is expected, around 99 mm (3.9 in), so pack an umbrella.
Rainfall in Seoul in May
Looking at the last 30 years, the data shows about 8 days with rain, averaging 99 mm (3.9 in) for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Seoul in May
May tends to be one of the perfect months in Seoul, with 24°C (75°F) in the afternoon and 12°C (54°F) overnight. Conditions stay fairly consistent through the month, making it easier to plan what to wear. At 12°C (54°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Seoul in May
Expect sunny days throughout the month, with an estimated 225 hours of sunshine. This makes it a pleasant time to visit Seoul.
Wind Speed in Seoul in May
Average wind conditions reach 2 m/s (4 knots) in May. This creates comfortable weather with light winds that gently move vegetation. Keep in mind this is an average. Daily conditions range from near-calm to more noticeable wind.If you're a fan of comfortable temperatures and drier conditions, May is a great time to visit.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Korea, check out our Seoul's climate page.
Seoul Temperature in May
Min Temperature
12°C (54°F)
Max Temperature
24°C (75°F)
Chance of Rain
27%
Precipitation
99 mm (3.9 in)
Rainy days
8 days
Humidity
58%
Windspeed
2 m/s (4 knots)
Sunshine
225 hours
Percentage Sunshine
52%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Seoul typically rise from around 22°C (72°F) at the start of May to approximately 26°C (79°F) by the end. Nights are cool, with lows typically ranging from 10°C (50°F) to 15°C (59°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Seoul in May
Browse day-by-day weather records for Seoul spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Seoul historical weather extremes in May
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Seoul.
- Seoul recorded its highest May temperature of 34°C (93°F) on May 21, 1998.
- On May 2, 1977, Seoul saw its coldest May day with temperatures maxing out at 13°C (55°F).
- Nighttime temperatures dropped to 3°C (37°F) on May 1, 2010, marking the coldest May night on record.
Best Places in South Korea in May
Find out more about the weather in South Korea and which places have the best travel conditions in this month. See all of South Korea in May →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Seoul in May
Comfortable temperatures call for an easy wardrobe in May. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Seoul in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Korea, check out our Seoul's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Seoul climate overview or explore weather in South Korea.
