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

Weather in January

January, the same as December, in Jeju, South Korea, is another chilly winter month, with average temperature fluctuating between 8.3°C (46.9°F) and 3.2°C (37.8°F). The coldest month is January, 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 »

Weather in February

The last month of the winter, February, is another chilly month in Jeju, South Korea, with average temperature ranging between max 9.4°C (48.9°F) and min 3.6°C (38.5°F). In Jeju, the average high-temperature is essentially the same as in January - a still chilly 9.4°C (48.9°F). Weather in February »

Weather in March

The first month of the spring, March, is a cool month in Jeju, South Korea, with average temperature fluctuating between 12.8°C (55°F) and 6.1°C (43°F). In March, the average high-temperature marginally rises, from a frosty 9.4°C (48.9°F) in February, to a fresh 12.8°C (55°F). Weather in March »

Weather in April

April is an enjoyable spring month in Jeju, South Korea, with average temperature varying between 10.2°C (50.4°F) and 17.5°C (63.5°F). In Jeju, the average high-temperature in April marginally rises, from a fresh 12.8°C (55°F) in March, to a comfortable 17.5°C (63.5°F). Weather in April »

Weather in May

May, the last month of the spring, in Jeju, is a pleasant month, with temperature in the range of an average low of 14.4°C (57.9°F) and an average high of 21.6°C (70.9°F). In May, the average high-temperature slightly increases, from a comfortable 17.5°C (63.5°F) in April, to a pleasant 21.6°C (70.9°F). Weather in May »

Weather in June

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

Weather in July

July, the same as June, is a moderately hot summer month in Jeju, South Korea, with average temperature ranging between min 23.3°C (73.9°F) and max 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 »

Weather in August

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). With an average high-temperature of 29.8°C (85.6°F) and an average low-temperature of 24.3°C (75.7°F), August is the warmest month. The average heat index in August is evaluated at a torrid 36.1°C (97°F). Weather in August »

Weather in September

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

Weather in October

October, like September, is another pleasant autumn month in Jeju, South Korea, with temperature in the range of an average high of 21.3°C (70.3°F) and an average low of 15.1°C (59.2°F). In October, the average high-temperature slightly decreases, from a moderately hot 25.8°C (78.4°F) in September, to an agreeable 21.3°C (70.3°F). Weather in October »

Weather in November

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

Weather in December

The first month of the winter, December, is still a cool month in Jeju, South Korea, with average temperature ranging between max 11°C (51.8°F) and min 5.3°C (41.5°F). In December, the average high-temperature drops, from a comfortable 16°C (60.8°F) in November, to a cool 11°C (51.8°F). Weather in December »
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FAQ

What is the coldest month in Jeju?

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

How many days does it rain in Jeju?

Throughout the year, there are 130.2 rainfall days, and 1497.7mm (58.96") of precipitation is accumulated.

What is the month with the least sunshine in Jeju?

The month with the least sunshine is January, with an average of 2.3h of sunshine.

What is the month with the lowest UV index in Jeju?

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

What are the least humid months in Jeju?

Months with the lowest humidity are February and March, with an average relative humidity of 64.9%.

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

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

What month has the most sunshine in Jeju?

With an average of 6.8h of sunshine, May has the most sunshine of the year in Jeju, South Korea.

When are the longest days in Jeju?

The month with the longest days in Jeju, South Korea, is June, with an average of 14.4h of daylight.

What is the most humid month in Jeju?

The most humid month is July, with an average relative humidity of 78.3%.

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.

What is the warmest month in Jeju?

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

What is the wettest month in Jeju?

The month with the most rainfall in Jeju is August when the rain falls for 13.5 days and typically aggregates up to 262.5mm (10.33") of precipitation.

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

The month with the warmest seawater is August, 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. Rain falls for 10.8 days and accumulates 47.7mm (1.88") 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 temperature - Jeju, South Korea

The warmest month (with the highest average high temperature) is August (29.8°C).
The month with the lowest average high temperature is January (8.3°C).

The month with the highest average low temperature is August (24.3°C).
The coldest month (with the lowest average low temperature) is January (3.2°C).

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Average humidity
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%).

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Average rainfall
Jeju, South Korea

Average rainfall - Jeju, South Korea

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

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Average rainfall days
Jeju, South Korea

Average rainfall days - Jeju, South Korea

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

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Average sea temperature
Jeju, South Korea

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).

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Average daylight / Average sunshine
Jeju, South Korea

Average daylight / Average sunshine - Jeju, South Korea

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 10h).

The month with the most sunshine is May (Average sunshine: 6.8h).
The month with the least sunshine is January (Average sunshine: 2.3h).

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