ClimateForecastSeptemberOctober >>

Weather in September in South Korea

Considering a trip to South Korea this September and wondering about the expected weather conditions? Find all the crucial information you need right here, addressing your question:

What is the weather like in South Korea in September?

September in South Korea generally has warm temperatures, with precipitation levels ranging from high to heavy.

Temperatures

The average maximum temperatures are warm and range from 23°C in Gangneung to 28°C in Gwangju. Nighttime temperatures generally drop to 17°C in Gwangju and 17°C in Gangneung.

Precipitation

In September, precipitation varies across different areas. From high rainfall in Ganghwa with an average of 121 mm to heavy rainfall in Gangneung with 203 mm.

Average sunshine

Seoul enjoys a balanced 182 hours of sunlight. Ensuring it's neither too overcast nor too sunny.

For specific regional insights in South Korea for September, refer to the map provided below. For an in-depth overview of the yearly weather conditions, do visit our South Korea climate page.

Where to go in South Korea in September

Find more information for the most popular destinations in the South Korea on the map below. Click on a destination dot for more detailes.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

Popular destinations

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

Seoul

In September Seoul generally has high temperatures with maximum daytime temperatures around 27°C, minimum nighttime temperatures around 17°C and high monthly rainfall. So on average the conditions are pleasant that month.

Seoul
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
31°C 
22°C 
154 hours 
260 mm 
13 days 
poor 
27°C 
17°C 
182 hours 
128 mm 
9 days 
October   >> October
>>  
21°C 
9°C 
207 hours 
55 mm 
7 days 
Climate in Seoul

Busan

In September Busan generally has high temperatures with maximum daytime temperatures around 26°C, minimum nighttime temperatures around 21°C and heavy monthly rainfall. So on average the conditions are pleasant that month.

Busan
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
29°C 
24°C 
200 hours 
204 mm 
12 days 
26°C 
21°C 
172 hours 
171 mm 
11 days 
October   >> October
>>  
22°C 
15°C 
208 hours 
75 mm 
6 days 
Climate in Busan

Jeju

In September Jeju generally has high temperatures with maximum daytime temperatures around 26°C, minimum nighttime temperatures around 22°C and heavy monthly rainfall. So on average the conditions are pleasant that month.

Jeju
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
29°C 
25°C 
193 hours 
175 mm 
13 days 
26°C 
22°C 
162 hours 
178 mm 
11 days 
October   >> October
>>  
21°C 
17°C 
178 hours 
82 mm 
8 days 
Climate in Jeju

Seogwipo

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

Seogwipo
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
30°C 
25°C 
186 hours 
229 mm 
13 days 
poor 
27°C 
21°C 
176 hours 
200 mm 
11 days 
October   >> October
>>  
22°C 
16°C 
209 hours 
90 mm 
8 days 
Climate in Seogwipo

Incheon

In September Incheon generally has high temperatures with maximum daytime temperatures around 26°C, minimum nighttime temperatures around 19°C and high monthly rainfall. So on average the conditions are pleasant that month.

Incheon
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
29°C 
23°C 
192 hours 
243 mm 
13 days 
26°C 
19°C 
202 hours 
128 mm 
8 days 
October   >> October
>>  
20°C 
11°C 
218 hours 
56 mm 
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 visit South Korea?

In our opinion, September is a good time to visit South Korea with overall pleasant weather in Seoul. It's worth noting that weather conditions might differ depending on the location you visit.

On average, the best time to visit South Korea is in May and October with generally perfect weather in Seoul. On the other hand, the months of January, July, August and December tend to 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 every country 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 recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.