If you plan to visit Jeju in May, the weather is typically alright, with an average high temperature of +20°C during the day and approximately 9 sunny days. Expect some rainy, though, as there are typically 12 rainy days in the month and around 106 mm of precipitation. The weather is changeable so you may have to pack for every eventuality. Search flightsin one click on Avionero.
Average weather
☀️
+20°C
Avg. max. temperature
+8°C
Min.
+32°C
Max.
106 mm
Total precipitation
75%
Avg. humidity
3 m/s
Avg. wind
9 ☀️
Sunny Days
10 ⛅️
Cloudy
12 🌦
Rainy
Our opinion: Jeju has OK weather in May.
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Average temperature in Jeju in May
Here are the expected maximum, average and minimum temperatures in Jeju for May based on the historical data.
Last Year
Historical Data
Going from a maximum of +25°C during the day to a minimum of +12°C during the night, the temperature in May averages around +20°C.
The average maximum temperature goes up 15% by the end of the month, compared with the beginning of the month, from +19°C to +21°C.
Is Jeju warm or cold in May?
Jeju is typically mild in May.
Maximum temperatures go up compared to the previous month from +16°C to +20°C. The minimum temperature also goes up from +11°C to +15°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
Take a look at how May is compared to other months in Jeju:
Climate in Jeju in May
Jeju weather looks like this, on average, in May and the surrounding months.
April
May
June
Avg. temperature
+16°C
+20°C
+23°C
Min. temperature
+4°C
+8°C
+12°C
Max. temperature
+27°C
+32°C
+31°C
Rainfall
99 mm
106 mm
193 mm
Wind
3 m/s
3 m/s
3 m/s
Humidity
71%
75%
82%
Air pressure
1015 HPa
1011 HPa
1007 HPa
Sunny days
8
9
4
Cloudy days
10
10
11
Rainy days
13
12
15
Snowy days
0
0
0
May typically has worse weather conditions compared to April.It’s getting warmer as May arrives. The average maximum temperature goes up from +16°C to +20°C during the day.Prepare for more rain. Average rainfall goes from 99 mm to 106 mm.Humidity rises from 71% to 75%.The average wind speed doesn’t change much during May, staying around 3 m/s.The good news is there are likely to be more sunny days in May, from 8 to 9.
Wind speed in Jeju in May based on historical data.
Last Year
Historical Data
The average wind speed is 3 m/s getting up to 7 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Jeju is gradually increasing during May, going from 2 m/s to 6 m/s over the course of the month.
Rain
Amount of rainfall in mm during May in Jeju based on historical data.
Last Year
Historical Data
Typically, there is a 42% chance of rain on an average day in May, with total rainfall of approximately 232 mm. The maximum amount of rainfall per day is around 56 mm, which is considered heavy rain.May is a pretty wet month with over 13 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of galoshes.
Here’s how May is compared with other months in the amount of precipitation, total mm:
Jeju wettest month is June, where a typical day has a 50% chance of precipitation and 193 mm of rainfall per day. December, on the other hand, is the driest month with a mere 48% chance of precipitation and 59 mm of rainfall per day.
How was the weather last May in Jeju?
This is the weather in Jeju in May 2024:
1 May
☀️
+19°C
2 May
☀️
+20°C
3 May
🌧️
+20°C
4 May
🌧️
+19°C
5 May
🌧️
+21°C
6 May
☁️
+19°C
7 May
🌧️
+16°C
8 May
☀️
+17°C
9 May
☀️
+19°C
10 May
☀️
+19°C
11 May
☀️
+20°C
12 May
🌧️
+19°C
13 May
☀️
+18°C
14 May
☀️
+20°C
15 May
☀️
+23°C
16 May
☁️
+25°C
17 May
☁️
+23°C
18 May
🌫️
+19°C
19 May
☁️
+21°C
20 May
☁️
+21°C
21 May
☁️
+20°C
22 May
☁️
+18°C
23 May
☀️
+20°C
24 May
☁️
+21°C
25 May
☁️
+21°C
26 May
☁️
+23°C
27 May
☁️
+22°C
28 May
☁️
+24°C
29 May
🌧️
+24°C
30 May
🌫️
+21°C
31 May
☁️
+21°C
In May 2024 Jeju had 10 sunny days, 13 cloudy days, and 6 rainy days. The average maximum temperature was +20°C, with an absolute maximum of +25°C and a minimum of +16°C. The average humidity was 80%, with a maximum of 100% and a minimum of 24%. The average wind speed was 3 m/s, with a maximum of 13 m/s and a minimum of 0 m/s.
Are you planning a trip in May?
Climate Change over Years
This is how Jeju climate have been changing during last 43 years period.
The climate in Jeju in May has not changed much over the last 43 years.
The average temperature was the lowest in 1980 (+17°C) and the highest in 2024 (+19°C). The driest year was 2005 with only 752 mm of rainfall, and the wettest year was 1985 with 1808 mm.
FAQ
Frequently asked questions about the weather in Jeju in May:
Is May a good time to visit Jeju?
It’s always a good time to visit Jeju, but the weather is changeable in May, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.
Can you sunbathe in Jeju in May?
May has mild temperatures in Jeju. Not ideal for sunbathing, but still good for daytime outdoor activities, but plan for cool evenings. Pack a light jacket and shorts!
Is Jeju rainy in May?
Jeju is often rainy in May. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in Jeju in May?
Usually, it’s not very sunny in Jeju in May, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
Other cities in South Korea
Check out the weather for other cities in South Korea.
For this page, we’ve looked at the typical weather in Jeju, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
