South KoreaAverage weather for Jeju in May
It's warm in May in Jeju with an average temperature of 23°C. Temperatures this month range from a low of 20°C to a high of 25°C. At night, you can expect temperatures between 13°C and 18°C.
Start of May
The month of May starts in Jeju with warm temps, averaging around 22°C during the day and nights around 14°C. You can expect regular precipitation, but there will also be some sunny days in the early part of the month.
Mid May
By mid-May, daytime temps rise to around 23°C, with nights around 16°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of May
By the end of May, the average daytime temperature in Jeju is around 24°C, while nighttime temps are about 17°C. A shower might pop up, but overall, the weather will be dry and sunny.
Water temperature
The water temperature at Jeju is 17°C this month. You can swim, but it's a bit chilly.
In May, there is an average of 107 mm of precipitation, spread over 8 days. The wind speed is around 4 Bft, mostly coming from the South.
Jeju in May |
New York | ||
|---|---|---|---|
 Average temperature |
23°C | 22°C | |
 Max. temperature |
25°C | 28°C | |
| Min. temperature |
20°C | -5°C | |
 Total precipitation |
107 mm | 105 mm | |
| Rainy days |
8 days | 14 days | |
April
UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is May a good time to visit Jeju?
Looking for sun? May isn’t a good month to be in Jeju. The temperature is nice, but there’s too much chance of rain.
Temperature records
With 33°C in 2019, Jeju reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 14°C in 2021. The extreme nighttime temperatures ranged from a lowest recorded value of 9°C to a highest value of 23°C.
Check out the climate of Jeju for all months and discover the best travel time
Curious about the weather in other parts of South Korea? Check out the climate and weather for spots like Seoul, Busan, or explore other destinations in South Korea.
Daily Temperature in May in Jeju
This chart shows the average daily high and low temperatures in May for Jeju, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in May in Jeju
The chart below shows the average daily precipitation in May for Jeju, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for May, you can expect about 8 days of precipitation in Jeju.
Daily UV index in May in Jeju
This chart shows the average daily UV index in May in Jeju, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in May in Jeju over the years
This chart shows the average temperature in May in Jeju, measured in degrees Celsius, over the past few years.
Total precipitation in May in Jeju over the years
This chart shows the average precipitation in May in Jeju, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in May for Jeju
Click on any day in May to get detailed info about the usual weather on that day in Jeju. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in May in Jeju
Have you been to Jeju in May?
Share your weather experience in May in Jeju.
Average weather in Jeju by month
Click on a month below to see detailed weather info for Jeju. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
