Jeju
South Korea
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Jeju, South Korea

A high sunrise Panorama of the Jeju Island in Jeju, South Korea
A high sunrise Panorama of the Jeju Island in Jeju, South Korea
January, the same as December, in Jeju, South Korea, is another chilly winter month, with temperature in the range of an average low of 3.2°C (37.8°F) and an average high of 8.3°C (46.9°F). January is the coldest month, with an average high-temperature of 8.3°C (46.9°F) and an average low-temperature of 3.2°C (37.8°F). Weather in January »
February, the last month of the winter, in Jeju, is also a frosty month, with average temperature fluctuating between 3.6°C (38.5°F) and 9.4°C (48.9°F). In Jeju, the average high-temperature is practically the same as in January - a still chilly 9.4°C (48.9°F). Weather in February »

March, the first month of the spring, in Jeju, is a cool month, with average temperature varying between 6.1°C (43°F) and 12.8°C (55°F). In Jeju, South Korea, the average high-temperature in March slightly increases, from a chilly 9.4°C (48.9°F) in February, to a cool 12.8°C (55°F). Weather in March »

April is a comfortable spring month in Jeju, South Korea, with temperature in the range of an average low of 10.2°C (50.4°F) and an average high of 17.5°C (63.5°F). In Jeju, the average high-temperature in April slightly increases, from a cool 12.8°C (55°F) in March, to an enjoyable 17.5°C (63.5°F). Weather in April »

The last month of the spring, May, is an agreeable month in Jeju, South Korea, with average temperature fluctuating between 14.4°C (57.9°F) and 21.6°C (70.9°F). In May, the average high-temperature marginally rises, from a comfortable 17.5°C (63.5°F) in April, to an agreeable 21.6°C (70.9°F). Weather in May »

The first month of the summer, June, is a warm month in Jeju, South Korea, with average temperature ranging between max 24.8°C (76.6°F) and min 18.7°C (65.7°F). In June, the average high-temperature marginally rises, from an agreeable 21.6°C (70.9°F) in May, to a moderately hot 24.8°C (76.6°F). Weather in June »

July, the same as June, is another warm summer month in Jeju, South Korea, with average temperature varying between 23.3°C (73.9°F) and 29°C (84.2°F). In July, the average high-temperature marginally rises, from a moderately hot 24.8°C (76.6°F) in June, to a still warm 29°C (84.2°F). Weather in July »

The last month of the summer, August, is also a moderately hot month in Jeju, South Korea, with temperature in the range of an average low of 24.3°C (75.7°F) and an average high of 29.8°C (85.6°F). August is the warmest month, with an average high-temperature of 29.8°C (85.6°F) and an average low-temperature of 24.3°C (75.7°F). In August, the average heat index is calculated to a sweltering 36.1°C (97°F). Weather in August »

The first month of the autumn, September, is also a moderately hot month in Jeju, South Korea, with average temperature fluctuating between 20.4°C (68.7°F) and 25.8°C (78.4°F). In Jeju, the average high-temperature slightly decreases, from a warm 29.8°C (85.6°F) in August, to a still moderately hot 25.8°C (78.4°F). Weather in September »

October, like September, is an agreeable autumn month in Jeju, South Korea, with average temperature ranging between max 21.3°C (70.3°F) and min 15.1°C (59.2°F). In October, the average high-temperature slightly decreases, from a warm 25.8°C (78.4°F) in September, to a pleasant 21.3°C (70.3°F). Weather in October »

The last month of the autumn, November, is another comfortable month in Jeju, South Korea, with temperature in the range of an average low of 9.8°C (49.6°F) and an average high of 16°C (60.8°F). In November, the average high-temperature drops, from an agreeable 21.3°C (70.3°F) in October, to a comfortable 16°C (60.8°F). Weather in November »

December, the first month of the winter, in Jeju, is still a cool month, with average temperature fluctuating between 11°C (51.8°F) and 5.3°C (41.5°F). In Jeju, the average high-temperature in December decreases, from a comfortable 16°C (60.8°F) in November, to a fresh 11°C (51.8°F). Weather in December »

What is the coldest month in Jeju?

With an average high-temperature of 8.3°C (46.9°F) and an average low-temperature of 3.2°C (37.8°F), January is the coldest month in Jeju, South Korea.

How many days does it rain in Jeju?

Throughout the year, there are 130.2 rainfall days, and 1497.7mm (59") of precipitation is accumulated.

What is the month with the least sunshine in Jeju?

The month with the least sunshine in Jeju, South Korea, is January, with an average of 2.3h of sunshine.

When is the lowest UV index in Jeju?

January and December, with an average maximum UV index of 3, are months with the lowest UV index.

What are the least humid months in Jeju?

February and March, with an average relative humidity of 64.9%, are the least humid months in Jeju.

What is the month with the coldest sea water in Jeju?

March is the month with the coldest seawater in Jeju, South Korea, with an average sea temperature of 13.3°C (55.9°F).

What month has the most sunshine in Jeju?

May has the most sunshine of the year, with an average of 6.8h of sunshine.

When are the longest days in Jeju?

With an average of 14.4h of daylight, June has the longest days of the year in Jeju.

What is the most humid month in Jeju?

With an average relative humidity of 78.3%, July is the most humid month in Jeju, South Korea.

When is the highest UV index in Jeju?

With an average maximum UV index of 11, July is the month with the highest UV index in Jeju.

What is the warmest month in Jeju?

August is the warmest month, with an average high-temperature of 29.8°C (85.6°F) and an average low-temperature of 24.3°C (75.7°F).

What is the rainiest month in Jeju?

August is the month with the most rainfall in Jeju, South Korea. Rain falls for 13.5 days and accumulates 262.5mm (10.3") of precipitation.

What is the month with the warmest sea water in Jeju?

August is the month with the warmest seawater, with an average sea temperature of 26.2°C (79.2°F).

What is the driest month in Jeju?

December is the month with the least rainfall in Jeju, South Korea. Rain falls for 10.8 days and accumulates 47.7mm (1.9") of precipitation.

What is the month with the shortest days in Jeju?

December has the shortest days of the year in Jeju, South Korea, with an average of 10h of daylight.
Average temperature - Jeju, South Korea
Average humidity - Jeju, South Korea

The month with the highest relative humidity is July (78.3%).
Months with the lowest relative humidity are February and March (64.9%).

Average rainfall - Jeju, South Korea

The wettest month (with the highest rainfall) is August (262.5mm).
The driest month (with the lowest rainfall) is December (47.7mm).

Average rainfall days - Jeju, South Korea

The month with the highest number of rainy days is August (13.5 days).
The month with the lowest number of rainy days is October (7 days).

Average sea temperature - Jeju, South Korea

The best month for swimming (with the highest average sea temperature) is August (26.2°C).
The coldest month (with the lowest average sea temperature) is March (13.3°C).

Average daylight / Average sunshine - Jeju, South Korea