Climate · Seoul

Seoul in May

Warm and mostly dry, as the days lengthen.

Typical weather, averaged over 30 years

May in Seoul is warm: highs near 74°F, lows near 52°F. Rain falls on about two days a week, and the days lengthen by 46 minutes from the first week to the last.May in Seoul is warm: highs near 23°C, lows near 11°C. Rain falls on about two days a week, and the days lengthen by 46 minutes from the first week to the last.

High
74°F23°Caverage
Low
52°F11°Caverage
Wet days
2a week · 26% of days
Daylight
14h 11mon average

Is May a good time to visit Seoul?


Yes. May is one of Seoul's best months (May, or September to October).

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How May sits in the year

week by week

Temperature

Highs near 74°F in May, against 38°F to 87°F through the year.Highs near 23°C in May, against 3°C to 31°C through the year.

Chance of a wet day

26% of days in May, against 14% to 58% through the year.

Cloud cover

47% cover in May, against 36% to 56% through the year.

Daylight

14h 11m in May, against 9h 37m to 14h 43m through the year.

Week by week, lightly smoothed, with May shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side


  1. April64°18°low 42°low 6°2 wet days a weekRain on about two days a week.
  2. May74°23°low 52°low 11°2 wet days a weekRain on about two days a week.
  3. June83°28°low 63°low 17°2 wet days a weekRain on about two days a week.

Where Seoul sits, in May

Asia/Seoul

this place
typical high in May 40°F4°C95°F35°C
Sunrise, mid-May
5:23 AMsets 7:33 PM
Above the sea
30 mlow-lying
Latitude
37.6°Nnorthern hemisphere
Nearest of ours
Busan325 km south-east

The land around Seoul, shaded by its typical high in May, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in South Korea in May

high · low · wet days

  • Busan72°22° · 57°14° 2
  • Jeju71°22° · 59°15° 2

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Seoul. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (30 m) against the climate model's (83 m).Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (30 m) against the climate model's (83 m). Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.