Because of the influence of the sea breeze, the weather on Jeju Island varies throughout the four seasons. So it's also known as an island where you can experience spring, summer, fall, and winter all in one day. The best time to visit is between March and May when there is a feast of flowers in full bloom.
January, February
Coldest time of the year in Jeju
The lowest temperature is approximately 6-7°C, which is warmer than in inland areas. However, due to the strong sea breeze, the wind chill temperature remains low. Hallasan Mountain and Oreum are closed during this time due to heavy snowfall. Driving in a rental car requires extra caution.
How to wear
To avoid cold winds, let's focus on winter clothing like thick coats and knitwear. It is also helpful to prepare winter supplies such as gloves, mufflers, and earplugs.
January
Average temperature: 6°C / 8°C Average rainfall: 22mm / 12 days
February
Average temperature: 7°C / 9°C Average rainfall: 24mm / 10 days
March, April, May
Warm weather, spring in Jeju where flowers are in full bloom
Warm spring is the best time to visit Jeju. Cold weather can last until March. However, from early April onwards, the average temperature rises to around 10°C, and spring flowers bloom earlier than in inland regions. Many visitors come to Jeju to see the magnificent scenery, which includes spring flowers like canola flowers and cherry blossoms in full bloom.
How to wear
Because the weather changes from time to time, let's pack a variety of outerwear, including coats and jumpers. Layering your clothes allows you to easily adapt to changing weather conditions. It is advisable to prepare a portable folding umbrella for unexpected spring rain.
March
Average temperature: 9°C / 12°C Average rainfall: 46mm / 12 days
April
Average temperature: 14°C / 17°C Average rainfall: 77mm / 11 days
May
Average temperature: 18°C / 21°C Average rainfall: 102mm / 12 days
June, July, August
Good weather to enjoy summer vacation
The highest temperature does not exceed 30°C, making it comfortable even in the summer. Rather, it feels cool due to the sea breeze. The rainy season causes all-day rain in July, and typhoons are common in August.
How to wear
Prepare summer clothing, such as cool short-sleeved T-shirts or shorts. Don't forget to bring raincoats and umbrellas in case of a rainy season or typhoon.
June
Average temperature: 21°C / 24°C Average rainfall: 133mm / 13 days
July
Average temperature: 26°C / 28°C Average rainfall: 328mm / 12 days
August
Average temperature: 27°C / 29°C Average rainfall: 248mm / 12 days
September, October
Expect the autumn wind to blow slowly
A time when the temperature drops to around 20°C and a cool autumn wind blows. The weather is warmer than in the inland part of the country, but the sea breeze can make it chilly after rain. Until September, it is subject to the influence of the rainy season, with frequent sudden showers.
How to wear
It is preferable to pack short-sleeved clothing, but a thin coat, such as a cardigan or jacket, should suffice. Let's bring a portable folding umbrella in case of autumn rain.
September
Average temperature: 23°C / 25°C Average rainfall: 138mm / 12 days
October
Average temperature: 18°C / 21°C Average rainfall: 49mm / 7 days
November, December
Falling temperatures, preparing for the winter
As if to signal the arrival of winter, the cool autumn breeze gradually cools. The difference in wind chill between when the sun shines and when it doesn't is especially noticeable. In mid-November, the first snow falls on Hallasan Mountain.
How to wear
Let's prepare several coats of appropriate thickness, such as coats and jumpers. Layers of moderate-thickness coats, which are easy to put on and take off, are ideal for temperature differences.
November
Average temperature: 13°C / 16°C Average rainfall: 53mm / 9 days
December
Average temperature: 8°C / 10°C Average rainfall: 25mm / 11 days