Daytime highs, nighttime lows and the warmest cities across South Korea this September.
South Korea, experiences high average maximum daytime temperatures in September, ranging from 23°C (73°F) in Gangneung to 28°C (82°F) in Gwangju. Nighttime temperatures generally drop to 17°C (63°F) in Gwangju and 17°C (63°F) in Gangneung.
To get a sense of September's typical temperatures in the key spots of South Korea, explore the map below. Click on a point for an in-depth look.
Check the conditions for any month of the year.
Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across South Korea.
Marker color shows the average daytime high temperature in September: blue is cold, red is hot.
Daytime temperatures in Seoul typically peak at 27°C (81°F) in September, putting it in the high range.
After dark, Seoul cools to about 17°C (63°F) on an average September night.
From a thorough analysis of our records, Gwangju clearly dominates in terms of high temperatures. The city witnesses daytime temperatures hovering around 28°C (82°F), and evenings that remain near 17°C (63°F).
According to our data, Gangneung holds the title for the coldest city in South Korea in September. It experiences maximum temperatures of approximately 23°C (73°F) and drops to lows of about 17°C (63°F) during the night.
Across South Korea, sunshine in September ranges from moderately sunny in Pyeongchang (147 hours) to sunny in Buan (217 hours).
The water temperature averages approximately 23°C (73°F) in Sosan this month, good for swimming and cooling off.
We have much more information about the climate in South Korea.
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