Jeju Weather in May
Thinking of visiting Jeju in May? Expect pleasant temperatures reaching 20°C (68°F) during the day, dropping to 15°C (59°F) at night, and note that quite a bit of rainfall is likely.
Rainfall in Jeju in May
Typically around 11 days of rainfall are expected, averaging 111 mm (4.4 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Jeju in May
May in Jeju brings pleasant temperatures, with highs of 20°C (68°F) and nights around 15°C (59°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With lows of 15°C (59°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.
Sunshine in Jeju in May
The days are predominantly sunny, with an estimated total of around 211 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.If you prefer enjoying temperate temperatures and rain-free days, October typically offers the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
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 Jeju's climate page.
Jeju Temperature in May
Min Temperature
15°C (59°F)
Max Temperature
20°C (68°F)
Chance of Rain
36%
Precipitation
111 mm (4.4 in)
Rainy days
11 days
Humidity
70%
Sunshine
211 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Jeju typically stay consistent throughout May, with daily highs averaging around 20°C (68°F). Nights are pleasant, with lows typically ranging from 12°C (54°F) to 16°C (61°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 Jeju in May
Browse day-by-day weather records for Jeju spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Jeju historical weather extremes in May
The extremes listed below come from historical weather data collected in Jeju from 1976 through 2025.
- The warmest day in May was on May 24, 2019, with a maximum of 32°C (90°F).
- On May 1, 1983, Jeju saw its coldest May day with temperatures maxing out at 13°C (55°F).
- The coldest night in May in Jeju was on May 6, 1976, with a minimum of 6°C (43°F).
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 →
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What to Wear in Jeju in May
Pleasant temperatures in May mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Jeju 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 Jeju's climate page.
Temperature Rainfall Sunshine Humidity
See the full Jeju climate overview or explore weather in South Korea.
