Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average humidity
- Average rainfall
- Average rainfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average UV index
A high sunrise Panorama of the Jeju Island in Jeju, South Korea
Weather in January
January, like December, is a frosty winter month in Jeju, South Korea, with an average temperature varying between 8.3°C (46.9°F) and 3.2°C (37.8°F). 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. Weather in January »
Weather in February
The last month of the winter, February, is another chilly month in Jeju, South Korea, with an 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 in February is almost 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 fresh month in Jeju, South Korea, with an average temperature varying between 12.8°C (55°F) and 6.1°C (43°F). In Jeju, 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 »
Weather in April
April is an enjoyable spring month in Jeju, South Korea, with an average temperature ranging between max 17.5°C (63.5°F) and min 10.2°C (50.4°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 »
Weather in May
May, the last month of the spring in Jeju, is an agreeable month, with an average temperature fluctuating between 14.4°C (57.9°F) and 21.6°C (70.9°F). In Jeju, South Korea, the average high-temperature in May marginally rises 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 moderately hot month, with an average temperature fluctuating between 24.8°C (76.6°F) and 18.7°C (65.7°F). In Jeju, the average high-temperature in June slightly increases from a pleasant 21.6°C (70.9°F) in May to a moderately hot 24.8°C (76.6°F). Weather in June »
Weather in July
July, like June, in Jeju, South Korea, is another warm summer month, with an average temperature fluctuating between 23.3°C (73.9°F) and 29°C (84.2°F). In July, the average high-temperature slightly increases 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 an average temperature varying between 29.8°C (85.6°F) and 24.3°C (75.7°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). The average heat index in August is evaluated at a very hot 36°C (96.8°F). Weather in August »
Weather in September
September, the first month of the autumn in Jeju, is also a moderately hot month, with an 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 a warm 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, the same as September, in Jeju, South Korea, is another pleasant autumn month, with an average temperature varying between 15.1°C (59.2°F) and 21.3°C (70.3°F). In October, the average high-temperature marginally drops from a warm 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 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 Jeju, the average high-temperature in November drops from an agreeable 21.3°C (70.3°F) in October to an enjoyable 16°C (60.8°F). Weather in November »
Weather in December
December, the first month of the winter in Jeju, is also a fresh month, with temperature in the range of an average high of 11°C (51.8°F) and an average low of 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 fresh 11°C (51.8°F). Weather in December »
[Resources]FAQ
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.
How many days does it rain in Jeju?
Throughout the year, there are 130.2 rainfall days, and 1498mm (58.98") of precipitation is accumulated.
What is the month with the least sunshine in Jeju?
With an average of 2.3h of sunshine, January has the least sunshine of the year in Jeju.
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?
The months with the lowest humidity in Jeju, South Korea, are February and March, with an average relative humidity of 64.9%.
What month is the sea coldest in Jeju?
With an average sea temperature of 13.3°C (55.9°F), March is the month with the coldest seawater in Jeju, South Korea.
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?
June has the longest days of the year in Jeju, South Korea, with an average of 14h and 20min of daylight.
What is the most humid month in Jeju?
July is the most humid month, with an average relative humidity of 78.3%.
When is the highest UV index in Jeju?
July is the month with the highest UV index in Jeju, with an average maximum UV index of 11.
What is the warmest month in Jeju?
The warmest month is August, 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. Rain falls for 13.5 days and accumulates 263mm (10.35") of precipitation.
What is the month with the warmest sea water in Jeju?
The month with the warmest seawater in Jeju, South Korea, is August, with an average sea temperature of 26.2°C (79.2°F).
What is the driest month in Jeju?
The month with the least rainfall in Jeju is December, when the rain falls for 10.8 days and typically collects 48mm (1.89") of precipitation.
What is the month with the shortest days in Jeju?
The month with the shortest days in Jeju is December, with an average of 9h and 59min of daylight.
Is there Daylight Saving Time (DST) in Jeju?
Jeju, South Korea, does not observe Daylight Saving Time (DST). KST timezone is used throughout the entire year.
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).
Average humidity
Jeju, South Korea
- Average humidity in January:
65.3% - Average humidity in February:
64.9% - Average humidity in March:
64.9% - Average humidity in April:
66.5% - Average humidity in May:
70.4% - Average humidity in June:
76.8%
- Average humidity in July:
78.3% - Average humidity in August:
76.5% - Average humidity in September:
73.7% - Average humidity in October:
66.9% - Average humidity in November:
65.1% - Average humidity in December:
65.1%
The month with the highest relative humidity is July (78.3%).
The months with the lowest relative humidity are February and March (64.9%).
Average rainfall
Jeju, South Korea
- Average rainfall in January:
65.2mm - Average rainfall in February:
62.6mm - Average rainfall in March:
88.6mm - Average rainfall in April:
89.6mm - Average rainfall in May:
96.4mm - Average rainfall in June:
181.4mm
- Average rainfall in July:
239.9mm - Average rainfall in August:
262.5mm - Average rainfall in September:
221.6mm - Average rainfall in October:
80.3mm - Average rainfall in November:
61.9mm - Average rainfall in December:
47.7mm
The wettest month (with the highest rainfall) is August (262.5mm).
The driest month (with the least rainfall) is December (47.7mm).
Average rainfall days
Jeju, South Korea
- Average rainfall days in January:
12.6 days - Average rainfall days in February:
10.3 days - Average rainfall days in March:
11.2 days - Average rainfall days in April:
10 days - Average rainfall days in May:
10.4 days - Average rainfall days in June:
11.8 days
- Average rainfall days in July:
12.5 days - Average rainfall days in August:
13.5 days - Average rainfall days in September:
10.8 days - Average rainfall days in October:
7 days - Average rainfall days in November:
9.3 days - Average rainfall days in December:
10.8 days
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).
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
- Average daylight in January:
10h and 1min - Average daylight in February:
11h and 0min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 0min - Average daylight in May:
13h and 5min - Average daylight in June:
14h and 2min
- Average daylight in July:
14h and 1min - Average daylight in August:
13h and 2min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 2min - Average daylight in November:
10h and 2min - Average daylight in December:
10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in January:
2h and 2min - Average sunshine in February:
3h and 5min - Average sunshine in March:
5h and 1min - Average sunshine in April:
6h and 3min - Average sunshine in May:
6h and 5min - Average sunshine in June:
5h and 4min
- Average sunshine in July:
6h and 2min - Average sunshine in August:
6h and 2min - Average sunshine in September:
5h and 2min - Average sunshine in October:
5h and 5min - Average sunshine in November:
4h and 1min - Average sunshine in December:
2h and 4min
The month with the most sunshine is May (Average sunshine: 6h and 48min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average UV index
Jeju, South Korea
The month with the highest UV index is July (UV index 11).
The months with the lowest UV index are January and December (UV index 3).
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