Climate · Jeju

Jeju in May

Warm and mostly dry, as the days lengthen.

Typical weather, averaged over 30 years

May in Jeju is warm: highs near 71°F, lows near 59°F. Rain falls on about two days a week, and the days lengthen by 39 minutes from the first week to the last.May in Jeju is warm: highs near 22°C, lows near 15°C. Rain falls on about two days a week, and the days lengthen by 39 minutes from the first week to the last.

High
71°F22°Caverage
Low
59°F15°Caverage
Wet days
2a week · 30% of days
Daylight
13h 53mon average

Is May a good time to visit Jeju?


Yes. May is one of Jeju's best months (May to June, or 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 71°F in May, against 49°F to 87°F through the year.Highs near 22°C in May, against 9°C to 31°C through the year.

Chance of a wet day

30% of days in May, against 28% to 51% through the year.

Cloud cover

52% cover in May, against 35% to 64% through the year.

Daylight

13h 53m in May, against 9h 58m to 14h 20m 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. April63°17°low 51°low 11°2 wet days a weekRain on about two days a week.
  2. May71°22°low 59°low 15°2 wet days a weekRain on about two days a week.
  3. June77°25°low 66°low 19°3 wet days a weekRain on about three days a week.

Where Jeju sits, in May

Asia/Seoul

this place
typical high in May 40°F4°C95°F35°C
Sunrise, mid-May
5:34 AMsets 7:26 PM
Above the sea
60 mlow-lying
Latitude
33.5°Nnorthern hemisphere
Nearest of ours
Busan299 km north-east

The land around Jeju, 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

  • Seoul74°23° · 52°11° 2
  • Busan72°22° · 57°14° 2

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Jeju. 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 (60 m) against the climate model's (270 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 (60 m) against the climate model's (270 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.