South Korea weather in September 2025
South Korea weather in September 2025
Day
26 °C
Night
20 °C
Sea
25 °C
Precipitation
190 mm
in month
Rainy days
10 days
in month
Daylight
12 hours
average
Sunshine
6 hours
average
Humidity
78 %
Day
26 °C
Night
20 °C
Sea
25 °C
Precipitation
190 mm
in month
Rainy days
10 days
in month
Daylight
12 hours
average
Sunshine
6 hours
average
Humidity
78 %
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Weather overview and FAQs
Weather overview
In September in South Korea, the average air temperature ranges from 26 °C (79 °F) during the day to 20 °C (68 °F) at night. There are 10 days of rain on average, where the rainfall is 190 mm (7.49 in).
Is September a good month to visit South Korea?
September is one of the best months to visit South Korea. The daily temperatures in this month reach pleasant 26 °C (79 °F). The temperature of the sea will be perfect at 25 °C (77 °F). At night, temperatures hover around a pleasant 20 °C (68 °F). There are only 10 days of rain in the whole month, so you can leave your umbrella at home.
What is the sea temperature in September in South Korea?
The temperature of the sea in South Korea in September is 25 °C (77 °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 temperature can I expect during the day in September in South Korea?
In South Korea in September, the average daily temperatures will be 26 °C (79 °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.
What is the average number of rainy days in September in South Korea?
In September in South Korea, we can expect 10 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 2.3 days of the week, or in general - 33 % days.
What is the rainfall intensity in September in South Korea?
In South Korea in September, there is 190 mm (7.49 in) rainfall, which means on average 6 mm (0.25 in) rainfall per day.
What is the night temperature in South Korea in September?
The average night temperature in South Korea in September is 20 °C (68 °F). A very pleasant temperature for long evening walks, fun over a drink outside, or doing sports in the morning. If possible, look for a hotel with air conditioning.
Is there a wet season in South Korea in September?
No, there is no wet season in South Korea in September - you can expect 10 days of rain during the month.
How windy is South Korea in September?
An average wind scale that can be expected in South Korea in September is 4.
How many sunny hours can I expect in South Korea in September?
In September in South Korea, you can expect around 6 hours of sunshine.
How long is the day (from dawn till dusk) in South Korea in September?
The length of daylight in South Korea in September is 12 hours.
Is the sea in South Korea warmer in September than in August?
No, the sea is not warmer in September in South Korea than in August.
Is the weather in South Korea warmer in September than in August?
No, September is not warmer in South Korea than August.
Is South Korea rainier in September than in October?
Yes, South Korea is a rainier September than in October.
What is the temperature trend in South Korea in September?
During September in South Korea, the day temperatures are decreasing - from 28 °C (82 °F) at the beginning of the month to 24 °C (75 °F) at the end of the month.
How humid is South Korea in September?
Humidity in South Korea in September is 78 %. This humidity is rather above average, but except for sensitive individuals, it should not be a problem.