Weather in September in South Korea

Many people wonder what kind of weather they can expect in September in South Korea. Is this month a good time to go to South Korea? To answer that question we created this page with all the information you need.

What is the weather like in South Korea in September?

The weather conditions in South Korea in September range from unpleasant to pleasant depending on the destination.

During September in South Korea, the average temperature ranges from pleasant in Pyeongchang with 20°C (67°F) to high in Seogwipo with 27°C (81°F). Minimum nighttime temperatures generally drop to 21°C (70°F) in Seogwipo and 11°C (51°F) in Pyeongchang .

Precipitation in September ranges from high in Miryang with an average of 132mm (5.2inch) rainfall to heavy in Pyeongchang with 247mm (9.7inch). It is also generally a moderate sunny month with an average of 182 hours of sunshine in Seoul during the whole month.

We invite you to have a look at the map below to find out more about the different weather conditions per location in South Korea.

Where to go in South Korea in September

Find the average weather conditions in September for the most popular destinations in South Korea on the map below. Click on a destination dot for more detailed information.

Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20-29ºC / 68-84ºF and not too much precipitation (less than 90mm / 3.5inch a month).

Popular destinations in South Korea

What is the weather like in September for the 5 most popular destinations in South Korea?

Average weather in Seoul

In September Seoul generally has high temperatures with maximum daytime temperatures around 26°C (79°F), minimum nighttime temperatures around 18°C (64°F) and high monthly rainfall. So on average the conditions are pleasant that month.

Seoul
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<<   August August
<<  
30°C / 87°F 
23°C / 73°F 
154 hours 
352mm / 14inch 
14 days 
poor 
26°C / 79°F 
18°C / 64°F 
182 hours 
145mm / 5.7inch 
9 days 
October   >> October
>>  
20°C / 69°F 
11°C / 51°F 
207 hours 
54mm / 2.1inch 
6 days 
Climate in Seoul

Average weather in Busan

In September Busan generally has high temperatures with maximum daytime temperatures around 26°C (79°F), minimum nighttime temperatures around 20°C (67°F) and high monthly rainfall. So on average the conditions are pleasant that month.

Busan
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<<   August August
<<  
29°C / 85°F 
24°C / 75°F 
200 hours 
255mm / 10inch 
12 days 
26°C / 79°F 
20°C / 67°F 
172 hours 
158mm / 6.2inch 
9 days 
October   >> October
>>  
22°C / 72°F 
15°C / 58°F 
208 hours 
58mm / 2.3inch 
5 days 
Climate in Busan

Average weather in Jeju

In September Jeju generally has high temperatures with maximum daytime temperatures around 26°C (79°F), minimum nighttime temperatures around 20°C (68°F) and heavy monthly rainfall. So on average the conditions are unpleasant that month.

Jeju
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<<   August August
<<  
30°C / 86°F 
24°C / 75°F 
193 hours 
265mm / 10inch 
14 days 
poor 
26°C / 79°F 
20°C / 68°F 
162 hours 
221mm / 8.7inch 
11 days 
October   >> October
>>  
21°C / 70°F 
15°C / 59°F 
178 hours 
82mm / 3.2inch 
7 days 
Climate in Jeju

Average weather in Seogwipo

In September Seogwipo generally has high temperatures with maximum daytime temperatures around 27°C (81°F), minimum nighttime temperatures around 21°C (70°F) and heavy monthly rainfall. So on average the conditions are tolerable that month.

Seogwipo
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<<   August August
<<  
30°C / 86°F 
25°C / 77°F 
186 hours 
292mm / 11inch 
14 days 
poor 
27°C / 81°F 
21°C / 70°F 
176 hours 
196mm / 7.7inch 
10 days 
October   >> October
>>  
23°C / 73°F 
16°C / 61°F 
209 hours 
85mm / 3.3inch 
6 days 
Climate in Seogwipo

Average weather in Incheon

In September Incheon generally has high temperatures with maximum daytime temperatures around 26°C (79°F), minimum nighttime temperatures around 18°C (64°F) and high monthly rainfall. So on average the conditions are pleasant that month.

Incheon
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<<   August August
<<  
29°C / 85°F 
23°C / 73°F 
192 hours 
272mm / 11inch 
13 days 
poor 
26°C / 79°F 
18°C / 64°F 
202 hours 
135mm / 5.3inch 
9 days 
October   >> October
>>  
20°C / 68°F 
12°C / 53°F 
218 hours 
52mm / 2inch 
6 days 
Climate in Incheon

Is your destination not in the list? Have a look at other destinations in South Korea.

Is September the best time to go to South Korea?

In our opinion September is a good time to visit South Korea with commonly pleasant weather in Seoul. However, the weather conditions may vary depending on your destination.

On average the best time to visit South Korea is in October with generally perfect weather in Seoul. The worst months are January, February, July, August and December that can have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in South Korea. Interested in the weather conditions in a specific month? Select the month below.

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  • Weather and climate has detailed information for almost all countries in the world. Are you going to South Korea? Get detailed historical weather averages for many cities in South Korea.

    Not sure yet where to go? We now have a tool which suggests which destination suits your ideal climate conditions. Find out where to go with our weather planner.