The temperatures in Jeju in May are comfortable with low of 15°C and and high up to 19°C.
You can expect about 3 to 8 days of rain in Jeju during the month of May. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Jeju in May 2026.
If you’re planning to visit Jeju in the near future, we highly recommend that you review the 14 day weather forecast for Jeju before you arrive.
Temperatures
19° / 15°
Rainy Days
5
Snowy Days
0
Dry Days
26
Rainfall
143
mm
Sun Hours
9.6
Hrs
