Do I need to wear cashmere pants to Jeju Island in mid-February?

The temperature in mid-February is estimated to be around 10 degrees. The temperature difference between day and night is not big.

Look at the weather forecast in advance. If you wear it on rainy days, it will be warm on sunny days. The main thing is to keep the upper body warm, and it doesn't matter on the legs.

Personal advice, just wear it. The weather in Jeju Island changes very quickly, mainly in windy weather. Wearing clothes does not take up luggage. If it gets hot, take it off and put it in the hotel. Are you not afraid of the cold when you return home?