Temperatures 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.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Jeju in May. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of May
The month of May starts in Jeju with warm temperatures, averaging around 22°C during the day and nights close to 14°C. You can expect regular precipitation, but there’s also a chance for some sunny days in the first days of the month.
Mid-May
By mid-May, the average daytime temperature rises to around 23°C, with nights close to 16°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days.
End of May
By the end of May, the average daytime temperature in Jeju will be around 24°C, with nights close to 17°C. A shower might show 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 on the chilly side.
Precipitation in May
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.
The average precipitation chance is 27% per day this month. Though it seems pretty low, the weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in May for Jeju. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Jeju in May |
London | ||
|---|---|---|---|
 Average Temperature |
23°C | 18°C | |
 High Temp |
25°C | 21°C | |
| Low Temp |
20°C | 15°C | |
 Total Precipitation |
107 mm | 46 mm | |
| Rainy Days |
8 days | 8 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?
After some sun? Then May isn’t the best time to be in Jeju. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for Jeju in May
With 33°C, Jeju hit the highest temperature in the last 10 years in May 2019. The lowest daytime temperature in this month was 14°C in 2021. The extreme night temperatures ranged from a low of 9°C to a high of 23°C.
Check out the climate of Jeju for all months and discover the best travel time
Curious about the climate in other parts of South Korea? Check out the weather and climate in places like Seoul, Busan, or have a look at other destinations in South Korea.
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Daily Temperature in May in Jeju
This chart shows the average daily temperatures, both day and night, for each day in May in Jeju, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in May in Jeju
The chart below shows the average daily precipitation in May for Jeju, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown 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 rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for May, you can expect around 8 days of rain 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 years.
Total Precipitation in May in Jeju Over the Years
This chart shows the average precipitation in May in Jeju, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in May for Jeju
Click on a specific day in May for detailed info on the typical 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.
