Seoul weather and climate
Seoul weather and climate
Day
20 °C
Night
9 °C
Sea
19 °C
Precipitation
54 mm
in month
Rainy days
6 days
in month
Daylight
11 hours
average
Sunshine
7 hours
average
Humidity
70 %
Day
20 °C
Night
9 °C
Sea
19 °C
Precipitation
54 mm
in month
Rainy days
6 days
in month
Daylight
11 hours
average
Sunshine
7 hours
average
Humidity
70 %
Weather charts for Seoul
We make the most from 40 years of historical weather data to predict the best weather conditions.
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Weather overview for Seoul
Weather overview
Seoul (South Korea) in general has a mild continental climate. Temperatures during the day are in the range from 2.1 °C (35.8 °F) in January to 29.5 °C (85.1 °F) in August. Temperatures during the night go from -6.7 °C (19.9 °F) in January to 21.6 °C (70.9 °F) in August. The least rainy month in Seoul is January with its 5 days of rain, the rainiest month is July, when it rains 15 days.
January weather
The day temperature is on its minimum, with its value of 2.1 °C (35.8 °F) in Seoul, while the descent of the sea temperature can be observed, with its value being 5.6 °C (42.0 °F). The rainfall amount reaches its minimum, and the number of rainy days reaches its minimum as well, with its value being 5 days. The ongoing dry season is noticeable. The night temperature is on its minimum, with its value being -6.7 °C (19.9 °F).
February weather
The day temperature starts to rise in Seoul, while the sea temperature is on its minimum, with its value of 4.1 °C (39.4 °F). The dry season continues. The night temperature rise's start could be observed, with its value of -4.4 °C (24.1 °F). The number of sun hours (without clouds) continues to rise, with its value of 6 hours.
March weather
The day temperature continues to rise, the value of this measure is 10.5 °C (50.9 °F) in Seoul, while the beginning of the rise of the sea temperature could be noticed, the value of this measure is 5.0 °C (40.9 °F). The number of rainy days starts to rise, and the rainfall amount rise's start could be observed as well, with its value of 47 mm (1.84 in). The rise of the night temperature can be observed. The wind speed is on its maximum in this month.
April weather
The day temperature rises similarly to the previous month, with its value being 18.2 °C (64.8 °F) in Seoul, and the sea temperature continues to rise too, its value is 8.2 °C (46.7 °F). The number of rainy days continues to rise, with its value of 7 days, and the rise of the rainfall amount can be observed as well, the value of this measure is 68 mm (2.70 in). The number of sun hours (without clouds) continues to rise, its value is 7 hours. The minimum of the humidity is observable, the value of this measure is 64 %.
May weather
The tourist season is about to start this month in Seoul. The rise of the sea temperature can be observed, with its value of 12.4 °C (54.4 °F), and the day temperature rises similarly to the previous month as well, its value is 23.1 °C (73.6 °F). The number of rainy days continues to rise, with its value being 8 days. The number of sun hours (without clouds) reaches its maximum, with its value being 8 hours. The rise of the night temperature can be observed, the value of this measure is 12.1 °C (53.8 °F).
June weather
The day temperature continues to rise, with its value being 26.9 °C (80.4 °F) in Seoul, and the sea temperature rises similarly to the previous month too, with its value of 17.2 °C (62.9 °F). The tourist season continues. The number of rainy days continues to rise, with its value of 9 days, and the rainfall amount continues to rise too, with its value of 127 mm (5.01 in). The night temperature rises similarly to the previous month, its value is 17.3 °C (63.1 °F).
July weather
The day temperature continues to rise, its value is 28.5 °C (83.3 °F) in Seoul, and the rise of the sea temperature can be observed as well, with its value of 21.4 °C (70.5 °F). The wet season is about to start. The maximum of the number of rainy days is observable, the value of this measure is 15 days, and the maximum of the rainfall amount is observable too, the value of this measure is 361 mm (14.23 in). The humidity is on its maximum, with its value being 82 %.
August weather
The day temperature is on its maximum, the value of this measure is 29.5 °C (85.1 °F) in Seoul, and the maximum of the sea temperature can be noticed too, the value of this measure is 24.1 °C (75.4 °F). The wet season continues. The beginning of the descent of the rainfall amount could be noticed, with its value being 318 mm (12.52 in), and the number of rainy days starts to descent too, with its value of 15 days. The night temperature reaches its maximum, its value is 21.6 °C (70.9 °F).
September weather
The day temperature descent's start could be observed in Seoul, and the beginning of the descent of the sea temperature could be noticed as well, the value of this measure is 23.2 °C (73.7 °F). The number of rainy days continues to descent, with its value being 9 days, and the rainfall amount descents similarly to the previous month too, its value is 158 mm (6.20 in). The tourist season is about to start in September. The beginning of the descent of the night temperature could be noticed, the value of this measure is 16.3 °C (61.3 °F).
October weather
The ongoing tourist season is noticeable in Seoul. The sea temperature continues to descent, with its value of 19.3 °C (66.8 °F), and the descent of the day temperature can be observed too, with its value of 20.2 °C (68.4 °F). The number of rainy days continues to descent, with its value of 6 days, and the rainfall amount descents similarly to the previous month too, the value of this measure is 54 mm (2.11 in). The night temperature continues to descent, with its value of 9.1 °C (48.4 °F).
November weather
The descent of the day temperature can be observed, with its value being 11.9 °C (53.4 °F) in Seoul, and the descent of the sea temperature can be observed too, the value of this measure is 14.4 °C (57.8 °F). The descent of the night temperature can be observed, with its value being 2.5 °C (36.5 °F). The number of sun hours (without clouds) descent's start could be observed in this month. The number of rainy days rise's start could be observed in November.
December weather
The descent of the day temperature can be observed, with its value being 4.4 °C (39.9 °F) in Seoul, and the sea temperature continues to descent too, the value of this measure is 9.3 °C (48.8 °F). The beginning of the descent of the number of rainy days could be noticed, with its value of 5 days. The night temperature continues to descent. The number of sun hours (without clouds) is on its minimum, the value of this measure is 5 hours. The day length is on its minimum, with its value of 9 hours.
FAQs
How many hours of sun to expect in Seoul in February?
In February in Seoul, you can expect around 6 hours of sunshine.
How humid is Seoul in March?
Humidity in Seoul in March is 65 %.
Is April part of the dry season in Seoul?
No, April is not a dry month in Seoul, expect rain approximately 7 days in a month.
How many rainy days can I expect in Seoul in May?
In Seoul in May, we can expect 8 days to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 1.8 days of the week, or in general - 26 % days.
Is it hot in June in Seoul?
In June in Seoul, you will enjoy nice warm weather, but it will also be pleasant and you probably won't feel hot.
Are there good conditions to visit in July in Seoul?
There are good conditions for visiting in July in Seoul. The temperature during the day will be nice 28.5 °C (83.3 °F). At night, temperatures hover around a pleasant 21.2 °C (70.2 °F). A sea temperature of 21.4 °C (70.5 °F) can seem colder to some, but others will call it refreshing. July is the wet season month in Seoul, which means that there may be more frequent rains during your stay.
What is the sea temperature in August in Seoul?
The temperature of the sea in August in Seoul is 24.1 °C (75.4 °F). It will be comfortable for you to spend even a long time in a sea warm like this, there will be people for whom this temperature will be too low or too high.
What is the temperature in Seoul during the day in September?
In Seoul in September, the average daily temperatures will be 25.9 °C (78.6 °F). The ideal temperature for enjoying sunbathing by the water and a good temperature for other activities. For some people, it will be too hot in the direct sunlight and the stay may not be so pleasant. Don't forget to pack flip-flops, sunscreen, and a hand fan if necessary - it may come in handy.
Is there a wet season in Seoul in October?
No, there is no wet season in Seoul in October - you can expect 6 days of rain during the month.
How windy is it in November in Seoul?
An average wind scale that can be expected in Seoul in November is 2.2. It is rather a milder or unnoticeable wind, therefore it will not bother you during your holiday.
What is the night temperature in Seoul in December?
The average night temperature in Seoul in December is -3.6 °C (25.5 °F). The nights will be cool, layers of clothes will be needed for evening and morning walks, the hotel should be equipped with heating.