The temperatures in Jeju in December are quite cold with temperatures between 6°C and 9°C, warm clothes are a must.
You can expect rain for roughly half of the month of December in Jeju. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
You can expect a few days of snow in Jeju during December. It’s important to get out your snow boots and warm mittens to stay warm while you explore Jeju.
Our weather forecast can give you a great sense of what weather to expect in Jeju in December 2025.
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
9° / 6°
Rainy Days
8
Snowy Days
3
Dry Days
21
Rainfall
92
mm
Sun Hours
7.1
Hrs
