South Korea in september: average Weather, Temperature and Climate, Where to go?
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
Clear/Sunny
39% of time
23%
15%
12%
Weather at 12pm
79°F
Clear/Sunny
46% of time
29%
16%
6%
Weather at 6pm
76°F
Clear/Sunny
46% of time
28%
14%
7%
Weather at 3am
68°F
43%
23%
13%
9%
Where to go in South Korea in september?
Where to go in South Korea in september: destination map
Where to go in each region in september?
| Central of South Korea (Cheongju, Koesan...) | 77°F to 79°F | 5 days | good weather | |
| East of South Korea (Daegu, Pohang, Andong...) | 76°F to 79°F | 5 à 6 days | 74°F to 76°F | good weather |
| North West of South Korea (Seoul, Incheon, Anseong...) | 77°F to 81°F | 4 à 6 days | 72°F | good weather |
| Northeast of South Korea (Sokcho, Gangneung, Chuncheon...) | 70°F to 77°F | 5 à 7 days | 72°F | good weather |
| South of South Korea (Busan, Jeju Island (Jejudo), Gwangju...) | 77°F to 81°F | 5 à 8 days | 74°F to 79°F | good weather* |
| West of South Korea (Daejeon, Jeonju, Seosan...) | 76°F to 79°F | 5 à 7 days | 74°F | good weather |
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 |
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 |
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 |
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 |
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 |
All cities in South Korea in september
| Seoul in september | good weather |
| Busan in september | good weather |
| Jeju Island (Jejudo) in september | tolerable weather |
| Andong in september | good weather |
| Anseong in september | good weather |
| Cheongju in september | good weather |
| Chuncheon in september | good weather |
| Daegu in september | good weather |
| Daejeon in september | good weather |
| Gangneung in september | good weather |
| Gwangju in september | good weather |
| Incheon in september | good weather |
| Jeonju in september | good weather |
| Koesan in september | good weather |
| Pohang in september | good weather |
| Seosan in september | good weather |
| Sokcho in september | good weather |
| Gyeongju in september | good weather |
| Ulleungdo Island in september | good weather |
| Namhae in september | good weather |
| Namiseom (Nami Island) in september | good weather |
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.