Weather in South Korea in september 2025

Below, find the the weather forecast for september for most popular cities in South Korea. These forecasts are probabilities for september from weather reports for many years. The percentage indicates the probability of having the weather mentioned.

Average weather in september in Seoul

good weather UV index: 6

Weather at 6am
67°F

Partly Cloudy

23%

Moderate rain at times

15%

Fog

12%

Weather at 12pm
79°F

Partly Cloudy

29%

Moderate rain at times

16%

Cloudy

6%

Weather at 6pm
76°F

Partly Cloudy

28%

Moderate rain at times

14%

Heavy rain

7%

Weather at 3am
68°F

Clear/Sunny

43%

Partly Cloudy

23%

Moderate rain at times

13%

Cloudy

9%

More information about the weather in Seoul in september



Where to go in South Korea in september?

Where to go in South Korea in september: destination map

South Korea: weather map in september in different regions
South Korea: weather map in september in different regions ©whereandwhen.net

Download the map

Where to go in each region in september?

Central of South Korea
(Cheongju, Koesan...)
77°F to 79°F5 days
good weather
East of South Korea
(Daegu, Pohang, Andong...)
76°F to 79°F5 à 6 days74°F to 76°F
good weather
North West of South Korea
(Seoul, Incheon, Anseong...)
77°F to 81°F4 à 6 days72°F
good weather
Northeast of South Korea
(Sokcho, Gangneung, Chuncheon...)
70°F to 77°F5 à 7 days72°F
good weather
South of South Korea
(Busan, Jeju Island (Jejudo), Gwangju...)
77°F to 81°F5 à 8 days74°F to 79°F
good weather*
West of South Korea
(Daejeon, Jeonju, Seosan...)
76°F to 79°F5 à 7 days74°F
good weather
*over most of the region. Weather may vary locally.


Where should you go in South Korea in september when it comes to the weather?

Remember:
The climate in South Korea in september is good across the board.

You are lucky: It is not ideal 100%, but the weather in South Korea that month is pretty good averywhere: in Taejon, Chuncheon, Gyeongju, Jeju Island (Jejudo), Daegu, Ulleungdo Island, Yeosu, Namiseom (Nami Island), Gangneung, Incheon, Tongyeong, Gwangju, Daejeon, Namhae, Seoul, Busan, Ulsan, Sokcho, Uljin and Pusan. I allows to appreciate sightseeing in these places. And even why not take a little time to take a nap at the pool under the sun!


Climate in South Korea in september

Climate in Seoul in september

In the month of september, maximum temperature is 81°F and minimum temperature is 67°F (for an average temperature of 74°F). The climate comfortable in that area in september. With 6in over 5 days, you risk getting wet slightly throughout your journey. But this is moderate and it will not be continuous.
With a good climate, the month of september is an advisable month to go in this locality in South Korea.

September
Average temperature 74°F
Highest temperature 81°F
Lowest temperature 67°F
Rainfall 6in
Number of days with rainfall 5 day(s)
(17%)
Humidity 82%
Daily sunshine hours 11
Cloud cover 33%
Length of day 12:26
Our opinion at whereandwhen.net good
more information about the climate in Seoul in september

Climate in Busan in september

In the month of september, maximum temperature is 77°F and minimum temperature is 72°F (for an average temperature of 76°F). The climate quite good in this city in september. With 6in over 6 days, rain may occur for your trip. But this is rather moderate and you will not be too bothered by it.
With good weather conditions, september is an advisable month to go there.

September
Average temperature 76°F
Highest temperature 77°F
Lowest temperature 72°F
Sea temperature 77°F
Rainfall 6in
Number of days with rainfall 6 day(s)
(19%)
Humidity 81%
Daily sunshine hours 11
Cloud cover 39%
Length of day 12:25
Our opinion at whereandwhen.net good
more information about the climate in Busan in september

Climate in Jeju Island (Jejudo) in september

In the month of september, maximum temperature is 77°F and minimum temperature is 72°F (for an average temperature of 76°F). The climate pleasant in this location in this month. With 11.3in over 8 days, rainfall can happen for your holidays. But this is rather moderate and it is only of temporary showers.
With a good weather, september is a good month to go there.

September
Average temperature 76°F
Highest temperature 77°F
Lowest temperature 72°F
Sea temperature 77°F
Rainfall 11.3in
Number of days with rainfall 8 day(s)
(28%)
Humidity 82%
Daily sunshine hours 10
Cloud cover 46%
Length of day 12:23
Our opinion at whereandwhen.net tolerable
more information about the climate in Jeju Island (Jejudo) in september

Climate in Andong in september

In september, the mean temperature in Andong is 68°F (maximum temperature is 77°F and minimum temperature is 58°F). The climate is quite enjoyable in this city in september. With 6.8in over 5 days, you will experience some showers throughout your holidays. But this is pretty moderate and you will not be too bothered by it.
With good weather conditions, september is a recommended month to go there.

September
Average temperature 68°F
Highest temperature 77°F
Lowest temperature 58°F
Rainfall 6.8in
Number of days with rainfall 5 day(s)
(17%)
Humidity 94%
Daily sunshine hours 11
Cloud cover 39%
Length of day 12:26
Our opinion at whereandwhen.net good
more information about the climate in Andong in september

Climate in Anseong in september

In the month of september, maximum temperature is 79°F and minimum temperature is 63°F (for an average temperature of 70°F). The climate is quite enjoyable in that locality in the month of september. With 6in over 5 days, rainfall can happen during your journey. But this is reasonably and you will not be too bothered by it.
With good weather conditions, the month of september is an advisable month to go in this city.

September
Average temperature 70°F
Highest temperature 79°F
Lowest temperature 63°F
Rainfall 6in
Number of days with rainfall 5 day(s)
(16%)
Humidity 89%
Daily sunshine hours 11
Cloud cover 35%
Length of day 12:26
Our opinion at whereandwhen.net good
more information about the climate in Anseong in september


All cities in South Korea in september

Seoul in septembergood weather
Busan in septembergood weather
Jeju Island (Jejudo) in septembertolerable weather
Andong in septembergood weather
Anseong in septembergood weather
Cheongju in septembergood weather
Chuncheon in septembergood weather
Daegu in septembergood weather
Daejeon in septembergood weather
Gangneung in septembergood weather
Gwangju in septembergood weather
Incheon in septembergood weather
Jeonju in septembergood weather
Koesan in septembergood weather
Pohang in septembergood weather
Seosan in septembergood weather
Sokcho in septembergood weather
Gyeongju in septembergood weather
Ulleungdo Island in septembergood weather
Namhae in septembergood weather
Namiseom (Nami Island) in septembergood weather
See full list of cities (64)


Weather data for South Korea in september:

Weather data for South Korea in september is derived from an average of the weather forecast since 2009 in South Korea. There is a margin of error and these forecasts are to be considered as general information only. The weather in South Korea can vary slightly from year to year, but these predictions should limit surprises. So you can pack your bags and check when is the best time to go to South Korea.


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